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skrapmetal's profile

New Member


5 Messages

Tuesday, May 9th, 2023 12:52 AM

Adding a line for a user currently on T-Mobile

Hello there, I am trying to add an additional user to my prepaid account but when I try to do so, I keep getting a 'Subscriber is not valid' error.  I am thinking the number must be ported over but I am unsure how to go about doing that.  The number is attached to a T-Mobile account that is NOT prepaid.  Would I first have to contact T-Mobile to release the number from the existing account?  And once that's done, how do I go about adding the number to my account?  Thank you!

Accepted Solution

Official Solution

ACE - Expert


64.7K Messages

11 months ago

To port a number from T-Mobile you need the T-Mobile account number and account pin. All prepaid numbers have their own account. You would first need to port the number, purchase a plan and then you can invite that number to join your multiline account. To start the port process, go to an ATT store or start here:

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