I've just updated a WR21 from 220.127.116.11 to 18.104.22.168 and now the modem doesn't connect to celluar network.
In network status> Interfaces>Mobile I get:
Registration Status: ERROR
SIM status: Please ensure correct PIN is configured, save config and reboot.
Signal strength: ERROR
I’ve verified the sim card in a mobile phone and the PIN I correct and internet connection is working fine.
I’ve saved the PIN again repeatedly but error is still the same.
I’ve tried to downgrade the router back to 22.214.171.124 but that didn’t help.
I made a factory reset but even then the error is the same.
Does anyone have any ideas or similar experience?