What adding an authorized user means and how to do it

An authorized user on a T-Mobile account is someone you give permission to manage that account — they can pay bills, change plans, add lines, or handle customer service calls on your behalf without needing your password. T-Mobile lets you add authorized users through their website, the T-Mobile app, or by calling customer service. The person you add doesn't need their own T-Mobile account; you're simply granting them access to yours.

The process takes about 10 minutes if you do it online, and T-Mobile doesn't charge a fee to add an authorized user. You'll need the person's full name, date of birth, and the last four digits of their Social Security number. Once you add them, they can log into your account using their own email address and password, or they can call T-Mobile and reference their authorization to speak with a representative about your account.

Key Takeaways

  • You can add an authorized user through the T-Mobile website, the T-Mobile app, or by calling 611 from a T-Mobile phone, and the process takes about 10 minutes.
  • An authorized user needs their full name, date of birth, and the last four digits of their Social Security number to be added to your account.
  • Authorized users can manage your account online, pay bills, change plans, and contact customer service, but you remain the account owner and responsible for charges.
  • You can remove an authorized user at any time through the same methods you used to add them, and the removal takes effect immediately.

Adding an authorized user through the T-Mobile website or app

Log into your T-Mobile account at t-mobile.com or open the T-Mobile app on your phone. Go to Account Settings or Account Management (the exact name varies slightly between the website and app). Look for a section called "Authorized Users" or "Account Access" — this is usually under a menu labeled "Account" or "Settings."

Click "Add Authorized User" and enter the person's full name, date of birth, and the last four digits of their Social Security number. T-Mobile will ask you to confirm the information and may send a verification code to your phone number on file. Once you verify, the authorized user is added immediately. They can then log in using their own email address and password, or they can call T-Mobile at 611 (from a T-Mobile phone) or 1-844-839-4644 and reference their authorization.

Adding an authorized user by phone

Call T-Mobile customer service at 611 from a T-Mobile phone, or call 1-844-839-4644 from any phone. Tell the representative you want to add an authorized user to your account. They will verify your identity by asking security questions or requesting information from your account.

Once verified, provide the authorized user's full name, date of birth, and the last four digits of their Social Security number. The representative will confirm the information and add them to your account on the spot. You'll receive a confirmation email, and the authorized user can start accessing your account immediately.

What an authorized user can and cannot do

An authorized user can pay your bill, change your plan, add or remove phone lines, upgrade devices, modify service features, and contact T-Mobile on your behalf. They can make these changes online through your account or by calling customer service. However, they cannot change the account owner's name, close the account, or transfer ownership — those actions require the account owner to do them directly.

You remain responsible for all charges on the account, even if an authorized user makes changes or incurs new fees. The authorized user is not liable for the bill; that responsibility stays with you as the account owner. If you're concerned about what changes an authorized user might make, you can check your account activity and billing history at any time to see what they've done.

Removing an authorized user

You can remove an authorized user whenever you want through the T-Mobile website, app, or by calling customer service. The removal takes effect immediately, and the person will no longer be able to access your account.

To remove them online, go to Account Settings, find the Authorized Users section, and select the person's name. Click "Remove" and confirm. To remove them by phone, call 611 or 1-844-839-4644, verify your identity, and ask the representative to remove the authorized user by name. You don't need to notify the person you're removing — they'll simply find they can no longer log in or access your account.

Security considerations when adding an authorized user

Only add someone you trust completely, because an authorized user has broad access to your account and billing information. They can see your phone number, service address, payment methods, and account history. If you add someone and later want to limit what they can see or do, your only option is to remove them entirely — T-Mobile doesn't offer partial permissions or restricted access levels.

If you suspect an authorized user has made unauthorized changes to your account, remove them immediately and review your recent account activity and billing. You can also contact T-Mobile to dispute any charges you didn't authorize. If someone has added themselves as an authorized user without your permission, this is a sign your account may have been compromised — change your password and contact T-Mobile right away.

Common reasons to add an authorized user

People typically add authorized users for specific situations: a spouse or partner who helps manage household bills, an adult child who handles a parent's account, a business manager who oversees company phone lines, or a caregiver who needs to make changes on behalf of someone else. In each case, the authorized user is someone who needs regular access to the account but doesn't need to own it.

If you're adding someone temporarily — for example, to help during a move or while you're traveling — you can remove them as soon as the situation changes. There's no minimum time period for having an authorized user, and you can add and remove people as often as you need to.

Frequently Asked Questions

Can an authorized user see my password?

No. An authorized user logs in with their own email address and password, not yours. They access your account through their own login, so they never need to know your password. You should keep your password private even from authorized users.

What happens if I add someone as an authorized user and then change my mind?

You can remove them at any time through the website, app, or by calling customer service. The removal is immediate, and they'll no longer be able to access your account. There's no waiting period or fee to remove an authorized user.

Can I add an authorized user if my account is in someone else's name?

No. Only the account owner can add or remove authorized users. If the account is in someone else's name, that person must add you as an authorized user themselves, or you'll need to contact T-Mobile to discuss changing the account owner.

Do authorized users show up on my bill?

Authorized users don't appear as a separate line item on your bill. Your bill shows only the phone lines and services on your account, not who has permission to manage it. The authorization is internal to your account and doesn't affect your billing statement.

Can I add a minor as an authorized user?

T-Mobile requires authorized users to be at least 18 years old. If you want to give a minor access to manage part of your account, you'll need to wait until they turn 18, or you can manage the account yourself on their behalf.