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 > USAGE & PLANS.
- Tap View Plan Details.
- Scroll to and tap Add a line and follow the on-screen instructions.
From a computer
- Go to My T-Mobile and log in to your account.
- Select SHOP.
- Select ADD A LINE and follow the on-screen instructions.