Issues using an unlocked Archer MR200 internationally

Installing and Using OpenWrt
1

Hi,

I have openwrt on the MR200 with a unlocked modem (it's from an operator but wasn't locked).

In Spain it works perfectly with any simcard.

Abroad it doesn't connect, even when I connect to the modem admin page and set the roaming on, tried different networks.

Any advice?

2

Install picocom kmod-usb-serial-option if not installed already.
Connect to the modem's AT port (probably, /dev/ttyUSB0 ) with picocom and query the registration status with AT+CEREG?

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