Quectel RG255C-GL can´t connect to private network 5G SA

IoT Modules 5G Module
,
61

When the Modem worked with the old firmware for both bands:

Band 78:
“cell”: {“type”: “servingcell”, “state”: “NOCONN”, “rat”: “NR5G-SA”, “duplex”: “TDD”, “mcc”: “240”, “mnc”: “49”, “nci”: “4AF97C3F2”, “pcid”: “80”, “tac”: “186BD”, “nrarfcn”: “634080”, “band”: “78”, “nr_dl_bw”: “3”, “rsrp”: “-80”, “rsrq”: “-10”, “sinr”: “23”, “scs”: “1”, “srxlev”: “47”}.

Band 28:
“cell”: {“type”: “servingcell”, “state”: “NOCONN”, “rat”: “NR5G-SA”, “duplex”: “FDD”, “mcc”: “240”, “mnc”: “49”, “nci”: “43483C7E9”, “pcid”: “28”, “tac”: “186BD”, “nrarfcn”: “154570”, “band”: “28”, “nr_dl_bw”: “1”, “rsrp”: “-89”, “rsrq”: “-12”, “sinr”: “4”, “scs”: “0”, “srxlev”: “38”}

With the new firmware, the UE can not connect to the network.

62

Dear @SimonKagstrom
I have sent to you via Message, please check.

63

Dear @Jameel_Ali
From the log, it registered on N78 before PING.
With new firmware, do you try to lock band and try again?

64

Hello @silvia

The UE register to the 5G-RedCap but after short time the UE searching again for cell to register.

AT+QNWPREFCFG=“mode_pref”,
+QNWPREFCFG: “mode_pref”,NR5G

I am sure the UE see the log below:

{‘ts’: ‘2026-04-23 16:42:18.475902’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘type’: ‘servingcell’, ‘state’: ‘NOCONN’, ‘rat’: ‘NR5G-SA’, ‘duplex’: ‘TDD’, ‘mcc’: ‘999’, ‘mnc’: ‘049’, ‘nci’: ‘4AF97C3F2’, ‘pcid’: ‘80’, ‘tac’: ‘186BD’, ‘nrarfcn’: ‘634080’, ‘band’: ‘78’, ‘nr_dl_bw’: ‘3’, ‘rsrp’: ‘-87’, ‘rsrq’: ‘-10’, ‘sinr’: ‘29’, ‘scs’: ‘1’, ‘srxlev’: ‘40’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-87’, ‘sinr’: ‘29’, ‘rsrq’: ‘-10’}, ‘nr5g_cell_id’: {‘ncgi’: ‘9999404AF97C3F2’, ‘nci’: ‘4AF97C3F2’, ‘gnodeb_id’: ‘4AF97C’}, ‘QRSRP’: {‘prx’: -87, ‘drx’: -88, ‘rat’: ‘NR5G’}, ‘QRSRQ’: {‘prx’: -10, ‘drx’: -10, ‘rat’: ‘NR5G’}, ‘QSINR’: {‘prx’: 29, ‘drx’: 27, ‘rat’: ‘NR5G’}, ‘QRSSI’: {‘prx’: -77, ‘drx’: -78, ‘rat’: ‘NR5G’}}
{‘ts’: ‘2026-04-23 16:42:18.975982’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘type’: ‘servingcell’, ‘state’: ‘NOCONN’, ‘rat’: ‘NR5G-SA’, ‘duplex’: ‘TDD’, ‘mcc’: ‘999’, ‘mnc’: ‘049’, ‘nci’: ‘4AF97C3F2’, ‘pcid’: ‘80’, ‘tac’: ‘186BD’, ‘nrarfcn’: ‘634080’, ‘band’: ‘78’, ‘nr_dl_bw’: ‘3’, ‘rsrp’: ‘-88’, ‘rsrq’: ‘-10’, ‘sinr’: ‘24’, ‘scs’: ‘1’, ‘srxlev’: ‘39’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-88’, ‘sinr’: ‘24’, ‘rsrq’: ‘-10’}, ‘nr5g_cell_id’: {‘ncgi’: ‘9999404AF97C3F2’, ‘nci’: ‘4AF97C3F2’, ‘gnodeb_id’: ‘4AF97C’}, ‘QRSRP’: {‘prx’: -88, ‘drx’: -89, ‘rat’: ‘NR5G’}, ‘QRSRQ’: {‘prx’: -10, ‘drx’: -10, ‘rat’: ‘NR5G’}, ‘QSINR’: {‘prx’: 24, ‘drx’: 22, ‘rat’: ‘NR5G’}, ‘QRSSI’: {‘prx’: -77, ‘drx’: -78, ‘rat’: ‘NR5G’}}
{‘ts’: ‘2026-04-23 16:42:19.476058’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘type’: ‘servingcell’, ‘state’: ‘NOCONN’, ‘rat’: ‘NR5G-SA’, ‘duplex’: ‘TDD’, ‘mcc’: ‘999’, ‘mnc’: ‘049’, ‘nci’: ‘4AF97C3F2’, ‘pcid’: ‘80’, ‘tac’: ‘186BD’, ‘nrarfcn’: ‘634080’, ‘band’: ‘78’, ‘nr_dl_bw’: ‘3’, ‘rsrp’: ‘-88’, ‘rsrq’: ‘-10’, ‘sinr’: ‘24’, ‘scs’: ‘1’, ‘srxlev’: ‘39’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:19.976170’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:20.476249’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:20.976351’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:21.476523’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:21.976659’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:22.476866’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:22.977070’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:23.477282’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:23.977439’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:24.477604’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:24.977677’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:25.477812’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:25.977886’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:26.478052’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:26.978269’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:27.478419’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:27.978519’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:28.478600’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:28.978677’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:29.478754’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:29.978830’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:30.479048’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:30.979229’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:31.479372’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:31.979574’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:32.479698’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:32.979833’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:33.479913’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:33.980070’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:34.480140’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:34.980245’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:35.480459’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:35.980555’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:36.480702’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:36.980827’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:37.480942’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:37.981052’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSRP’: {‘prx’: -87, ‘drx’: -88, ‘rat’: ‘NR5G’}, ‘QRSRQ’: {‘prx’: -10, ‘drx’: -10, ‘rat’: ‘NR5G’}, ‘QSINR’: {‘prx’: -5, ‘drx’: 4, ‘rat’: ‘NR5G’}, ‘QRSSI’: {‘prx’: -76, ‘drx’: -78, ‘rat’: ‘NR5G’}}
{‘ts’: ‘2026-04-23 16:42:38.481199’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:38.981305’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:39.481439’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:39.981515’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:40.481593’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:40.981687’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:41.481858’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:41.981959’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:42.482045’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:42.982151’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:43.482369’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:43.982436’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:44.482548’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:44.982630’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:45.482743’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:45.982871’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:46.482986’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:46.983114’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:47.483236’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:47.983383’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:48.483533’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:48.983592’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:49.483730’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:49.983805’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:50.483907’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:50.984025’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:51.484243’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:51.984298’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:52.484391’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:52.984492’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:53.484589’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-23 16:42:53.984667’, ‘m_id’: ‘201’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSRQ’: {‘prx’: -18, ‘drx’: -12, ‘rat’: ‘NR5G’}, ‘QSINR’: {‘prx’: 25, ‘drx’: 21, ‘rat’: ‘NR5G’}, ‘QRSSI’: {‘prx’: -99, ‘drx’: -97, ‘rat’: ‘NR5G’}}

65

Here are some AT commands output

AT+QSCAN?
OK
AT+QSCAN=?
+QSCAN: (1-3)

OK
AT+QNWCFG=“redcap_search_timer”
+QNWCFG: “redcap_search_timer”,61

OK
AT+QNWCFG=“nr5g_cell_type”
+QNWCFG: “nr5g_cell_type”,1

OK
AT+QNWCFG=“nr5g_cell_type”
+QNWCFG: “nr5g_cell_type”,1

OK
AT+QNWPREFCFG=“nr5g_band”
+QNWPREFCFG: “nr5g_band”,78

OK
AT+COPS?
+COPS: 0,0,“240 49”,11

66

Dear @silvia

I changed the modem to a different one (both rg255c). I still have the same issue. The modem is searching for a cell from time to time with different random periods. Please see the logs:

{‘ts’: ‘2026-04-28 11:50:44.793911’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘type’: ‘servingcell’, ‘state’: ‘NOCONN’, ‘rat’: ‘NR5G-SA’, ‘duplex’: ‘TDD’, ‘mcc’: ‘999’, ‘mnc’: ‘049’, ‘nci’: ‘4AF97C3F2’, ‘pcid’: ‘80’, ‘tac’: ‘186BD’, ‘nrarfcn’: ‘634080’, ‘band’: ‘78’, ‘nr_dl_bw’: ‘3’, ‘rsrp’: ‘-87’, ‘rsrq’: ‘-10’, ‘sinr’: ‘22’, ‘scs’: ‘1’, ‘srxlev’: ‘39’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-87’, ‘sinr’: ‘22’, ‘rsrq’: ‘-10’}, ‘nr5g_cell_id’: {‘ncgi’: ‘9999404AF97C3F2’, ‘nci’: ‘4AF97C3F2’, ‘gnodeb_id’: ‘4AF97C’}, ‘QRSRP’: {‘prx’: -95, ‘drx’: -87, ‘rat’: ‘NR5G’}, ‘QRSRQ’: {‘prx’: -10, ‘drx’: -10, ‘rat’: ‘NR5G’}, ‘QSINR’: {‘prx’: 19, ‘drx’: 22, ‘rat’: ‘NR5G’}, ‘QRSSI’: {‘prx’: -84, ‘drx’: -77, ‘rat’: ‘NR5G’}}
{‘ts’: ‘2026-04-28 11:50:45.294115’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘type’: ‘servingcell’, ‘state’: ‘NOCONN’, ‘rat’: ‘NR5G-SA’, ‘duplex’: ‘TDD’, ‘mcc’: ‘999’, ‘mnc’: ‘049’, ‘nci’: ‘4AF97C3F2’, ‘pcid’: ‘80’, ‘tac’: ‘186BD’, ‘nrarfcn’: ‘634080’, ‘band’: ‘78’, ‘nr_dl_bw’: ‘3’, ‘rsrp’: ‘-87’, ‘rsrq’: ‘-10’, ‘sinr’: ‘22’, ‘scs’: ‘1’, ‘srxlev’: ‘39’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-87’, ‘sinr’: ‘22’, ‘rsrq’: ‘-10’}, ‘nr5g_cell_id’: {‘ncgi’: ‘9999404AF97C3F2’, ‘nci’: ‘4AF97C3F2’, ‘gnodeb_id’: ‘4AF97C’}, ‘QRSRP’: {‘prx’: -95, ‘drx’: -87, ‘rat’: ‘NR5G’}, ‘QRSRQ’: {‘prx’: -10, ‘drx’: -10, ‘rat’: ‘NR5G’}, ‘QSINR’: {‘prx’: 19, ‘drx’: 22, ‘rat’: ‘NR5G’}, ‘QRSSI’: {‘prx’: -84, ‘drx’: -77, ‘rat’: ‘NR5G’}}
{‘ts’: ‘2026-04-28 11:50:45.794207’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:46.294326’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:46.794416’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:47.294521’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:47.796042’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:48.296165’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:48.796272’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:49.296348’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:49.796463’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:50.296560’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-32768’, ‘sinr’: ‘-32768’, ‘rsrq’: ‘-32768’}, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:50.796686’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:51.296780’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:51.796905’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:52.297060’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:52.797199’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:53.297355’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:53.797588’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:54.297665’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:54.797784’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:55.297877’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSRP’: {‘prx’: -92, ‘drx’: -90, ‘rat’: ‘NR5G’}, ‘QRSRQ’: {‘prx’: -10, ‘drx’: -10, ‘rat’: ‘NR5G’}, ‘QSINR’: {‘prx’: -11, ‘drx’: 2, ‘rat’: ‘NR5G’}, ‘QRSSI’: {‘prx’: -81, ‘drx’: -80, ‘rat’: ‘NR5G’}}
{‘ts’: ‘2026-04-28 11:50:55.798032’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:56.298146’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:56.798259’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:57.298440’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:57.798527’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:58.298636’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:58.798721’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:59.298806’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:50:59.798888’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:51:00.298998’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:51:00.799073’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:51:01.299225’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:51:01.799321’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:51:02.299457’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:51:02.799521’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:51:03.299710’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:51:03.799795’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘raw’: ‘+QENG: “servingcell”,“SEARCH”’}, ‘src_ip’: ‘10.95.0.61’, ‘QRSSI’: {‘prx’: None, ‘drx’: None, ‘rat’: ‘LTE’}}
{‘ts’: ‘2026-04-28 11:51:04.299868’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘type’: ‘servingcell’, ‘state’: ‘NOCONN’, ‘rat’: ‘NR5G-SA’, ‘duplex’: ‘TDD’, ‘mcc’: ‘240’, ‘mnc’: ‘49’, ‘nci’: ‘4AF97C3F2’, ‘pcid’: ‘80’, ‘tac’: ‘186BD’, ‘nrarfcn’: ‘634080’, ‘band’: ‘78’, ‘nr_dl_bw’: ‘3’, ‘rsrp’: ‘-89’, ‘rsrq’: ‘-10’, ‘sinr’: ‘0’, ‘scs’: ‘1’, ‘srxlev’: ‘38’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-89’, ‘sinr’: ‘0’, ‘rsrq’: ‘-10’}, ‘nr5g_cell_id’: {‘ncgi’: ‘42F0944AF97C3F2’, ‘nci’: ‘4AF97C3F2’, ‘gnodeb_id’: ‘4AF97C’}, ‘QRSRP’: {‘prx’: -90, ‘drx’: -89, ‘rat’: ‘NR5G’}, ‘QRSRQ’: {‘prx’: -10, ‘drx’: -10, ‘rat’: ‘NR5G’}, ‘QSINR’: {‘prx’: -1, ‘drx’: 0, ‘rat’: ‘NR5G’}, ‘QRSSI’: {‘prx’: -79, ‘drx’: -78, ‘rat’: ‘NR5G’}}
{‘ts’: ‘2026-04-28 11:51:04.799971’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘type’: ‘servingcell’, ‘state’: ‘NOCONN’, ‘rat’: ‘NR5G-SA’, ‘duplex’: ‘TDD’, ‘mcc’: ‘240’, ‘mnc’: ‘49’, ‘nci’: ‘4AF97C3F2’, ‘pcid’: ‘80’, ‘tac’: ‘186BD’, ‘nrarfcn’: ‘634080’, ‘band’: ‘78’, ‘nr_dl_bw’: ‘3’, ‘rsrp’: ‘-89’, ‘rsrq’: ‘-10’, ‘sinr’: ‘0’, ‘scs’: ‘1’, ‘srxlev’: ‘38’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-89’, ‘sinr’: ‘0’, ‘rsrq’: ‘-10’}, ‘nr5g_cell_id’: {‘ncgi’: ‘42F0944AF97C3F2’, ‘nci’: ‘4AF97C3F2’, ‘gnodeb_id’: ‘4AF97C’}, ‘QRSRP’: {‘prx’: -90, ‘drx’: -89, ‘rat’: ‘NR5G’}, ‘QRSRQ’: {‘prx’: -10, ‘drx’: -10, ‘rat’: ‘NR5G’}, ‘QSINR’: {‘prx’: -1, ‘drx’: 0, ‘rat’: ‘NR5G’}, ‘QRSSI’: {‘prx’: -79, ‘drx’: -78, ‘rat’: ‘NR5G’}}
{‘ts’: ‘2026-04-28 11:51:05.300047’, ‘m_id’: ‘202’, ‘module’: ‘RG255C-GL’, ‘imsi’: ‘240019100002365’, ‘cell’: {‘type’: ‘servingcell’, ‘state’: ‘NOCONN’, ‘rat’: ‘NR5G-SA’, ‘duplex’: ‘TDD’, ‘mcc’: ‘240’, ‘mnc’: ‘49’, ‘nci’: ‘4AF97C3F2’, ‘pcid’: ‘80’, ‘tac’: ‘186BD’, ‘nrarfcn’: ‘634080’, ‘band’: ‘78’, ‘nr_dl_bw’: ‘3’, ‘rsrp’: ‘-89’, ‘rsrq’: ‘-10’, ‘sinr’: ‘22’, ‘scs’: ‘1’, ‘srxlev’: ‘38’}, ‘src_ip’: ‘10.95.0.61’, ‘signal’: {‘rat’: ‘NR5G’, ‘rsrp’: ‘-89’, ‘sinr’: ‘22’, ‘rsrq’: ‘-10’}, ‘nr5g_cell_id’: {‘ncgi’: ‘42F0944AF97C3F2’, ‘nci’: ‘4AF97C3F2’, ‘gnodeb_id’: ‘4AF97C’}, ‘QRSRP’: {‘prx’: -90, ‘drx’: -89, ‘rat’: ‘NR5G’}, ‘QRSRQ’: {‘prx’: -10, ‘drx’: -10, ‘rat’: ‘NR5G’}, ‘QSINR’: {‘prx’: 21, ‘drx’: 22, ‘rat’: ‘NR5G’}, ‘QRSSI’: {‘prx’: -80, ‘drx’: -78, ‘rat’: ‘NR5G’}}

67

Dear @Jameel_Ali
I have sent AT command to you via Message, please try.

68

Hello Silvia,

I am experiencing the same issue with the Quectel RM255C-GL module. My firmware version is:

AT+QGMR
RM255CGLAAR01A02M4G_01.001.01.001

The module is not connecting to my private 5G SA network configured with 20 MHz bandwidth. I am operating the Quectel module on Windows.

The module fails to register:

+C5GREG: 0,0
or
+C5GREG: 2,0

Additionally, manual operator selection with AT+COPS results in:

+CME ERROR: 30

The same SIM card works correctly in a smartphone on the same network.

Could you please help me with this issue?

Thank you for your support.

69

Hi Silvia,

I’m running into the same problem described in this thread. My RG255C-GL and won’t register on a private 5G NR SA network (Band n78), even though it detects the cell fine:

RSRP and SINR are good, the PLMN and Cell ID are correct, but it never starts the RACH procedure — AT+CEREG? stays at 0 and AT+COPS=1,2,“74099”,12 gives +CME ERROR: 30. The same SIM and network work fine, the issue is only this module.

I already tried mode_pref=NR5G, ue_usage_setting=1 (data-centric), disabling IMS, AT+CFUN=1,1, and different PLMN/TAC values — no luck.

From what I read here, this got solved with the right firmware, so I’d really appreciate if you could send it to me too.

70

Dear @AJano
I have sent firmware and AT command to your email, please try.

71

Dear @Juan_Diego_Belesaca
Please share your current firmware.

72

Hello @silvia

The current firmware is: RG255CGLABR01A04M4G

73

Dear @Juan_Diego_Belesaca
I have sent to your email, please check.