Some time back, I got the $20 per month unlimited data card from AT&T. I switched from the micro SIM to the nano SIM and used an adapter in my hotspot. Somewhat more recently, I got a $20 per month line for my mother-in-law. I also switched her to the nano SIM and used an adaptor. However, on Thanksgiving Day, I was doing some SIM card swapping and her nano SIM card, in the adaptor, was no longer recognized by the AT&T Unite Express 2 AC797S or AT&T Unite Explore AC815S hot spots. So, earlier today we stopped by an AT&T store and switched back to an AT&T micro SIM and all is well.

Anyway, has anybody here had problems using nano SIM cards in SIM card adaptors?