Hello Quectel Support,
I am testing VoLTE on an EG25-GC module and would like to request the latest compatible firmware package and QFirehose tool for Linux.
Module:
- Model: EG25-GC
- Firmware: EG25GGCR07A02M1G_01.001.01.001
- USB VID/PID: 2C7C:0125
- Home operator: China Unicom
- Roaming network: KDDI Japan
- MBN AutoSel: enabled
LTE data and SMS work, but IMS does not register. Outgoing calls fail or terminate immediately, and incoming callers hear that the subscriber is unavailable.
Relevant results:
AT+QCFG="ims"
+QCFG: "ims",1,0
AT+QCFG="volte_disable"
+QCFG: "volte/disable",0
AT+QCFG="roamservice"
+QCFG: "roamservice",255
AT+QMBNCFG="AutoSel"
+QMBNCFG: "AutoSel",1
AT+QMBNCFG="List"
+QMBNCFG: "List",13,1,1,"OpenMkt-Commercial-CU",0x05011505,202001171
AT+CGDCONT?
+CGDCONT: 1,"IPV4V6","3gnet",...
+CGDCONT: 2,"IPV4V6","3GWAP",...
+CGDCONT: 3,"IPV4V6","WONET",...
AT$QCPDPIMSCFGE?
$QCPDPIMSCFGE: 1,0,0,0
$QCPDPIMSCFGE: 2,0,0,0
$QCPDPIMSCFGE: 3,0,0,0
AT+CEER
+CEER: 2,173
The IMS and SOS PDP contexts are not provisioned. The same SIM successfully establishes VoLTE in another compatible Quectel-based modem whose MBN package contains:
CU-VoLTE, 0x05011508, 2022xxxx
This suggests that the older CU MBN bundled with the current EG25-GC firmware may not support the required IMS configuration or current roaming interoperability.
Could you please provide:
1. The latest production firmware for EG25-GC, exact variant EG25GGCR07A02M1G.
2. A firmware package containing CU-VoLTE MBN 0x05011508 or a newer compatible China Unicom profile.
3. The recommended QFirehose version for Linux.
4. Upgrade instructions and any required options for USB/QDL mode.
5. Guidance on backing up and preserving NV, calibration, IMEI and operator configuration before upgrading.
6. Release notes describing IMS, VoLTE or MBN updates.
I have not manually selected the visited-network KDDI MBN and would prefer to retain IMSI-based MBN AutoSel.
Thank you.
Dear Customer,
Your firmware is pretty old. Let me send you the latest firmware through your email. Please check there.
Regards,
Fazrul Redzuan