I found the answer. Since those routers were branded Orange, they changed the firmware so you can use them only in a fixed location, as long you are connected with PC to a specific "admin page" named...

Model : Hardware Version : Firmware Version : ISP : Hello, I have two ARCHER MR 200, Orange Romania branded. I have 2 PrePay SIM cards. Both cards with active internet. I connect LAN cable to PC and...