Gone for the Archer MR200 AC750 instead. .

I'll need to use a USB extention for a better signal. Which model would you recommend? Or do you think it would be easier if I just got a router with a sim slot like the MR6400?

I'm having problems with the above hardware. The router works perfectly when the M7350 is plugged into the USB slot. Unfortunately the USB port doesn't supply enough power to keep the M7350 charged....