So I had an issue today with my cell data on my tmobile ipad rmini I swapped the verizon sim in it the other weekend. Since then I swapped back to tmobile and today I was trying to figure out why I had "no service" all over town. Finally I reset the network setting which reset the ipad. Now it works as expected again but for future knowledge, once I have the vzw setting, and I switch back doi I need to reset the network settings, restart the ipad, or is there something simpler? Going from tmobile to vzw requires nothing.