Learn how to add a line to your monthly account on My T-Mobile.
Before adding a line to your account, you'll need to make sure you are the Primary Account Holder. The account will also need to be current.
To add a line to your account on My T-Mobile, follow these steps:
- Log in to My T-Mobile.
- Click SHOP.
- Click the Add a line button and follow the on-screen instructions to add a line to your account.