Can you expand on this please? I switched to Xfinity last year. Purchased the iPhone 12 Pro from Xfinity. Then added my wife (transferred her number from ATT) and used my unlocked Note 10 for her phone. I recently just purchased her a used iPhone XS and plan on moving her sim from Note 10 to XS. This is until I find some good deals on an iPhone 12/13 for her around Thanksgiving. So are you saying that I can't just move her sim from Note 10 to XS? Thanks