I'm trying to swap one number to another on my sim card both of the phone numbers are in my account and temporally disable the account I will be removing active phone number of, can I do that without going into an AT&T store?
No, you can’t change the number assigned to the SIM card. If you want to move a number from one phone to another, move the SIM card. If the phone you want to move it to needs a different size SIM card, you will need a new SIM card.
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