Learn how to find your account number on My T-Mobile. If you have a Pay in Advance (Prepaid) account, your mobile number is your account number.
To find your account number, follow these steps:
- Log in to My T-Mobile.
- Click BILLING.
- Under Bill Summary, click Past Bills.
- Click Download bill (View PDF on a mobile phone) next to one of your statements. Your account number will display at the top of the bill.