I’m having the same issue with an RM500Q-GL
MM version: 1.14.2
mmcli -m any
-----------------------------------
General | dbus path: /org/freedesktop/ModemManager1/Modem/0
| device id: a3e908bd7918e22d8142e72f50494268fee117ed
-----------------------------------
Hardware | manufacturer: QUALCOMM INCORPORATED
| model: RM500QGL_VF
| firmware revision: RM500QGLAAR01A01M4G_BETA_20200517F
| carrier config: Telstra_Australia_Commercial
| carrier config revision: 0A010F00
| h/w revision: 20000
| supported: gsm-umts, lte, 5gnr
| current: gsm-umts, lte, 5gnr
| equipment id: redacted
-----------------------------------
System | device: /sys/devices/platform/soc/8af8800.usb3/8a00000.dwc3/xhci-hcd.0.auto/usb2/2-1
| drivers: qmi_wwan, option
| plugin: quectel
| primary port: cdc-wdm0
| ports: cdc-wdm0 (qmi), ttyUSB0 (qcdm), ttyUSB2 (at), wwan0 (net),
| ttyUSB1 (gps), ttyUSB3 (at)
-----------------------------------
Status | lock: sim-pin2
| unlock retries: sim-pin (3), sim-puk (10), sim-pin2 (3), sim-puk2 (10)
| state: connected
| power state: on
| access tech: lte
| signal quality: 92% (recent)
-----------------------------------
Modes | supported: allowed: 3g; preferred: none
| allowed: 4g; preferred: none
| allowed: 3g, 4g; preferred: 4g
| allowed: 3g, 4g; preferred: 3g
| allowed: 5g; preferred: none
| allowed: 3g, 5g; preferred: 5g
| allowed: 3g, 5g; preferred: 3g
| allowed: 4g, 5g; preferred: 5g
| allowed: 4g, 5g; preferred: 4g
| allowed: 3g, 4g, 5g; preferred: 5g
| allowed: 3g, 4g, 5g; preferred: 4g
| allowed: 3g, 4g, 5g; preferred: 3g
| current: allowed: 4g, 5g; preferred: 5g
-----------------------------------
Bands | supported: utran-1, utran-3, utran-4, utran-6, utran-5, utran-8,
| utran-2, eutran-1, eutran-2, eutran-3, eutran-4, eutran-5, eutran-7,
| eutran-8, eutran-12, eutran-13, eutran-14, eutran-17, eutran-18,
| eutran-19, eutran-20, eutran-25, eutran-26, eutran-28, eutran-29,
| eutran-30, eutran-32, eutran-34, eutran-38, eutran-39, eutran-40,
| eutran-41, eutran-42, eutran-46, eutran-48, eutran-66, eutran-71,
| utran-19
| current: utran-1, utran-3, utran-4, utran-6, utran-5, utran-8,
| utran-2, eutran-1, eutran-2, eutran-3, eutran-4, eutran-5, eutran-7,
| eutran-8, eutran-12, eutran-13, eutran-14, eutran-17, eutran-18,
| eutran-19, eutran-20, eutran-25, eutran-26, eutran-28, eutran-29,
| eutran-30, eutran-32, eutran-34, eutran-38, eutran-39, eutran-40,
| eutran-41, eutran-42, eutran-46, eutran-48, eutran-66, eutran-71,
| utran-19
-----------------------------------
IP | supported: ipv4, ipv6, ipv4v6
-----------------------------------
3GPP | imei: redacted
| operator id: 50501
| operator name: Telstra
| registration: home
-----------------------------------
3GPP EPS | ue mode of operation: csps-1
-----------------------------------
SIM | dbus path: /org/freedesktop/ModemManager1/SIM/0
-----------------------------------
Bearer | dbus path: /org/freedesktop/ModemManager1/Bearer/0
It’s definitely picking up a 5G signal
AT+QENG="Servingcell"
+QENG: "servingcell","NOCONN"
+QENG: "LTE","FDD",505,01,8C76D02,497,1300,3,5,5,700B,-86,-15,-48,18,-
+QENG:"NR5G-NSA",505,01,475,-105,130,-11