I know this is probably a dumb question but I have a full upgrade due on one of my lines and want to purchase a phone at a subzidized price. My question is, if I were to purchase a new phone (for that one upgraded line), would it be ok to take that new Sim card (out of the newly upgraded line/phone) and put it in one of my other phones (that are not due for upgrade as of yet)? This way the new Sim card would be in the older line/phone and the older Sim would be in the brand new phone, upgraded line. Basically, what I'm asking is, does T-Mobile care which Sim card is in which phone or do you have to strictly keep that new Sim card with the new phone?
I really would appreciate if someone could help me with this question and I thank you in advance for your time.
Deb