Ive been trying to find the answer but I can’t seem to find it. If I was to buy an Apple Watch on T-Mobile could I then use it on AT&T? I’m sure the answer is yes but want to double check.
The answer is "Yes", it should be seamless to transition to AT&T as long as you pick a valid post-paid plan that supports the addition of a Wearable plan. Note: not all AT&T post-paid accounts provide support for Wearable plans!