I am using a BPI R4 with a WIFI7 module and a Quectel RM520N-GL LTE modem. With the modem installed or disconnected, the SIM lights in all slots do not light up when there is a SIM inside. No matter what I do, it can’t seem to detect any SIM. I’ve already tried a few AT commands like
mmcli -m 0 --command="AT+QSIMDET=0,0" and mmcli -m 0 --command="AT+QUIMSLOT=1" but nothing works. It’s currently in usbnet mode 2 which is MBIM but even in 0 (QMI) it doesn’t show up.
I’m on OpenWrt 25.12.0 and the modem firmware version is RM520NGLAAR03A03M4G
root@OpenWrt:~# mmcli -m any
-----------------------------------
General | path: /org/freedesktop/ModemManager1/Modem/0
| device id: f7d33bde9ba12dbde9af3fe334a839611e2cd98b
-----------------------------------
Hardware | manufacturer: Quectel
| model: RM520N-GL
| firmware revision: RM520NGLAAR03A03M4G
| carrier config: Volte_OpenMkt-Commercial-CMCC
| carrier config revision: 0A012010
| h/w revision: RM520N-GL
| supported: gsm-umts, lte, 5gnr
| current: gsm-umts, lte, 5gnr
| equipment id: 868371056197219
-----------------------------------
System | device: /sys/devices/platform/soc/11200000.usb/usb2/2-1/2-1.1
| physdev: /sys/devices/platform/soc/11200000.usb/usb2/2-1/2-1.1
| drivers: cdc_mbim, option1
| plugin: quectel
| primary port: cdc-wdm0
| ports: cdc-wdm0 (mbim), ttyUSB0 (ignored), ttyUSB1 (gps),
| ttyUSB2 (at), ttyUSB3 (at), wwan0 (net)
-----------------------------------
Status | state: failed
| failed reason: sim-missing
| power state: on
-----------------------------------
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: 4g, 5g; preferred: 5g
| allowed: 4g, 5g; preferred: 4g
| allowed: 3g, 5g; preferred: 5g
| allowed: 3g, 5g; preferred: 3g
| allowed: 3g, 4g, 5g; preferred: 5g
| allowed: 3g, 4g, 5g; preferred: 4g
| allowed: 3g, 4g, 5g; preferred: 3g
| current: allowed: 3g, 4g, 5g; preferred: 5g
-----------------------------------
Bands | supported: utran-1, 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-43, eutran-46, eutran-48, eutran-66, eutran-71,
| utran-19, ngran-1, ngran-2, ngran-3, ngran-5, ngran-7, ngran-8,
| ngran-12, ngran-13, ngran-14, ngran-18, ngran-20, ngran-25, ngran-26,
| ngran-28, ngran-29, ngran-30, ngran-38, ngran-40, ngran-41, ngran-48,
| ngran-66, ngran-70, ngran-71, ngran-75, ngran-76, ngran-77, ngran-78,
| ngran-79
| current: utran-1, utran-4, 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-43, eutran-46, eutran-48, eutran-66, eutran-71,
| utran-19, ngran-1, ngran-2, ngran-3, ngran-5, ngran-7, ngran-8,
| ngran-12, ngran-13, ngran-14, ngran-18, ngran-20, ngran-25, ngran-26,
| ngran-28, ngran-29, ngran-30, ngran-38, ngran-40, ngran-41, ngran-48,
| ngran-66, ngran-70, ngran-71, ngran-75, ngran-76, ngran-77, ngran-78,
| ngran-79
-----------------------------------
IP | supported: ipv4, ipv6, ipv4v6
-----------------------------------
3GPP | imei: 868371056197219
-----------------------------------
SIM | sim slot paths: slot 1: none (active)
| slot 2: none