I finally got onto iPhone upgrade program this year using my Dad's T-Mobile account because mine is too old or something. I don't want to next year have them activate the iPhone, and I'd rather would do that with my E-Sim. Is there anything I can tell them next year, So I don't have any issues? He uses an Samsung Galaxy S21. This time was a pain. Since they activated it and he lost service on his phone, and I had to go to the T-Mobile store to get it activated again with an new sim.