I have come back from my trip. the router can connect to telecom, and got 3G and 4G connection. it just said the telecom does not allow it to register something like that. i have no idea why the...

In my last trip to Taiwan, I have purchased a 4G sim card. When I insert into the M7350, the Sim Card activation fail. I found that the date and time of M7350 is reset to 2015 and it cannot update...