Setting up a Quectel RM520GL-N on a Banana Pi R4-Pro

[Philip Prindeville]

And per the "Manual verification" steps:

root at OpenWrt:~# uqmi -d /dev/cdc-wdm0 --get-serving-system
{
        "registration": "not_registered",
        "radio_interface": [
                "lte"
        ],
        "plmn_mcc": 310,
        "plmn_mnc": 410,
        "plmn_description": "",
        "roaming": true
}
root at OpenWrt:~# uqmi -d /dev/cdc-wdm0 --get-signal-info
{
        "type": "lte",
        "rssi": -73,
        "rsrq": -9,
        "rsrp": -102,
        "snr": 11.600000
}
root at OpenWrt:~# uqmi -d /dev/cdc-wdm0 --get-data-status
"disconnected"
root at OpenWrt:~# uqmi -d /dev/cdc-wdm0 --start-network fast.t-mobile.com --autoco
nnect
"Call failed"
root at OpenWrt:~# uqmi -d /dev/cdc-wdm0 --get-data-status
"disconnected"
root at OpenWrt:~# 

> On Mar 15, 2026, at 5:13 PM, Philip Prindeville <philipp_subx at redfish-solutions.com> wrote:
> 
> This is also new:
> 
> root at OpenWrt:~# uqmi -d /dev/cdc-wdm0  --uim-get-sim-state
> {
>        "card_slot": 1,
>        "card_application_state": "illegal",
>        "pin1_status": "disabled",
>        "pin1_verify_tries": 3,
>        "pin1_unlock_tries": 10,
>        "pin2_status": "not_verified",
>        "pin2_verify_tries": 10,
>        "pin2_unlock_tries": 10
> }
> root at OpenWrt:~# 
> 
> 
>> On Mar 15, 2026, at 4:50 PM, Philip Prindeville <philipp_subx at redfish-solutions.com> wrote:
>> 
>> Reseated the SIM card.
>> 
>> Sun Mar 15 16:46:33 2026 daemon.notice netifd: Interface 'qmi' is setting up now
>> Sun Mar 15 16:46:33 2026 daemon.notice netifd: qmi (6753): Waiting for SIM initialization
>> Sun Mar 15 16:46:33 2026 daemon.notice netifd: qmi (6753): SIM in illegal state - Power-cycling SIM
>> Sun Mar 15 16:46:41 2026 daemon.notice netifd: qmi (6753): SIM in illegal state - Power-cycling SIM
>> Sun Mar 15 16:46:50 2026 daemon.notice netifd: qmi (6753): SIM in illegal state - Power-cycling SIM
>> Sun Mar 15 16:46:58 2026 daemon.notice netifd: qmi (6753): SIM in illegal state - Power-cycling SIM
>> Sun Mar 15 16:47:06 2026 daemon.notice netifd: qmi (6753): SIM in illegal state - Power-cycling SIM
>> Sun Mar 15 16:47:14 2026 daemon.notice netifd: qmi (6753): SIM in illegal state - Power-cycling SIM
>> Sun Mar 15 16:47:23 2026 daemon.notice netifd: qmi (6753): SIM in illegal state - Power-cycling SIM
>> Sun Mar 15 16:47:31 2026 daemon.notice netifd: qmi (6753): SIM in illegal state - Power-cycling SIM
>> Sun Mar 15 16:47:39 2026 daemon.notice netifd: qmi (6753): SIM in illegal state - Power-cycling SIM
>> Sun Mar 15 16:47:48 2026 daemon.notice netifd: qmi (6753): SIM in illegal state - Power-cycling SIM
>> Sun Mar 15 16:47:56 2026 daemon.notice netifd: qmi (6753): SIM in illegal state - Power-cycling SIM
>> Sun Mar 15 16:47:59 2026 daemon.notice netifd: qmi (6839): Stopping network qmi
>> Sun Mar 15 16:47:59 2026 daemon.notice netifd: qmi (6839): Command failed: ubus call network.interface notify_proto { "action": 0, "link-up": false, "keep": false, "interface": "qmi" } (Permission denied)
>> Sun Mar 15 16:47:59 2026 daemon.notice netifd: Interface 'qmi' is now down
>