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TMobile locked my AT&T Phone
Hi, I newly purchased AT&T Postpaid Iphone week before. During the activation Instead of AT&T SIM Card by mistake i put TMobile SIM Card into it (Ultra Mobile SIM Card) So my AT&T Phone got locked...
You need to contact Tmobile support because this is basically a user to user forum with some tmobile moderation that don't have account access so no one here can really help. All we can do is point you in a direction that may help.
What you're going to need to do to meet the requirements for a unlock code is open a prepaid Tmobile account with a $100 in refills and activate it and after 14 days the phone should automatically unlock.
https://www.t-mobile.com/responsibility/consumer-info/policies/sim-unlock-policy
