how do I switch ipad mini 4 from AT&T to Verizon

Once service is activated, AT&T locks the AppleSIM to their network - not the device, just the AppleSIM. Verizon doesn’t participate in the AppleSIM program anyway, so you’ll need to get a Verizon SIM regardless to setup service with Verizon.

Hi

If ipad is not locked to AT&T just try a simcard from Verizon.

Cheers

Brian 🇬-1F1E7;