The 'No SIM Found' is misleading error. when using the unit, I get this msg, then after turning it off and on, sometimes several times, sometimes ejecting and re-inserting the SIM it just starts...

I just got an Archer MR200 last week and I'm finding it very frustrating to work with. Every so often it stops connecting and shows no SIM found. The SIM is not a problem as I've successfully...