You can give your lines preferred names to help you tell who uses which line.

Personal accounts

You can log in to T-Mobile.com and update the name assigned to each line as the the Primary Account Holder (PAH) on the account.

1. Log into your T-Mobile.com account.
2. Select your name at the top right or My Account
3. Select Profile.
4. Select Line Settings.
5. Select Preferred name.
6. Enter the name.
7. Select Save.

Business accounts (21+ lines)

For business accounts with 20 lines or fewer, you manage your lines as a personal account holder does. Click the button above to change lines preferred name.

1. Log in to your T-Mobile.com account.
2. Select Your Profile 
3. Go to Customer information.
4. Update the name
5. Select Save.