Adding a line to your account is easy. Let us show you how.
Only the Primary Account Holder can add lines to an account, and the account must be current.
From a mobile device with the T-Mobile app
- Open the app. If you don't have it, download it now.
- Tap Menu > Shop.
- Scroll down and tap Add A Line, then follow on-screen instructions.
From a computer
- From your My T-Mobile account, select Shop.
- Scroll down and select Add A Line, then follow on-screen instructions.