Good evening, Quectel Team!
Recently i bought a 4g module as EM120R-GL from second hand oа laptop parts, and it detected onli in pcie on my BPI-R4, but SIM is unreachable.
Input data:
- Banana PI R4 router under ROOTer OS GoldenOrb_2026-02-26 ( OpenWrt 24.10.3 );
- Quectel EM120R-GL modem with IMEI 015930000280256 and SN P1C21D528000036;
- Modem connected to pci-e key-b;
- lsusb -t show no modem device;
- lcpci -k show 0003:01:00.0 Unassigned class [ff00]: Quectel Wireless Solutions Co., Ltd. EM120R-GL LTE Modem
Subsystem: Quectel Wireless Solutions Co., Ltd. Device 2001
Kernel driver in use: mhi-pci-generic; - uname -a
Linux ROOter 6.6.104 #0 SMP Fri Sep 19 21:19:38 2025 aarch64 GNU/Linux; - AT+QGMR
EM120RGLAPR02A07M4G_18.018.18.018; - SIM inserted correctly, in SIM-slot2 on modem;
-On “Modem status” in web-interface i see:
Tue Mar 10 16:05:32 2026 : Get Profile 1 Modem 1 is Quectel EM120R-GL
Tue Mar 10 16:05:32 2026 : Get Profile 1 Warning: IMSI cannot be read - SIM card missing or locked?
Tue Mar 10 16:05:32 2026 : Get Profile 1 Default Profile Used
Tue Mar 10 16:05:33 2026 : SimLock 1 No SIM
Tue Mar 10 16:05:33 2026 : Create MHI Connection 1 SIM Error
Steps to reproduce problem:
AT+QUIMSLOT=1
OK
AT+CPIN?
+CME ERROR: 10
AT+QUIMSLOT=2
OK
AT+CPIN?
+CME ERROR: 14
AT+QCFG=“usbnet”
+QCFG: “usbnet”,0
OK
Questions:
- Where i can take latest and previous firmware for this modem?
- Whch flashtool can flash modem on OpenWRT router or on Windows OS, and where i can get flashing tool?
- What modes does the modem support? (MBIM\QMI\ACM\ECM etc)
- How i can change between this modes?
- Does this modem support work in USB mode without using an adapter, connected directly in pcie slot with b-key?
- If I understand correctly, the -GLAU version can work in USB and PCI mode, but the GLAP version will work onli in PCI mode, right?
- Can i flash modem -GLAU instead current -GLAP version?
- How do I make the modem see the SIM card?
I am ready to provide any additional information if needed.