Wireless Joint

So I have had a Mobile Citizens Sprint plan that came with a Coolpad Surf.

I have had it in an Airmaster 4000d almost the 1.5 years I have had the plan. It worked flawlessly up until the last couple days in which the Airmaster just never connects.

So I popped the sim back in the Coolpad and it connects right away.

I am wondering if T Mobile may have shut down band 41 in my area. Is there any way to tell based on the attached screenshot what band the coolpad is actually connected to?

Thanks for any insights.

Can you tell what band the coolpad is connecting to? It is very possible they are recommissioning the b41 for n41 or removing it altogether. Tmo has be very aggressive lately with network changes.