You can update your billing address and your E911 addresses online. 

Change E911 address on each line

An E911 address allows emergency services to determine the location of each phone or device, in case they need to call 911. Wi-Fi Calling and some other T-Mobile products require a valid E911 address to work. You must update each line's E911 address when they move.

1. Go to My T-Mobile and log in to your account. Make sure the line changing the address has master privileges.
2. Click your name at the top right > Profile.
3. Select a line from the Select Line drop-down.
4. Click Line Settings > E911 Address.
5. Enter the new E911 address. This address should be the primary place where you use the line.
6. Click Save changes. Repeat this for any other lines that moved.

Certain T-Mobile services, such as Wi-Fi calling and DIGITS, require that you provide us with the primary street address at which the service will be used (“Your E911 Registered Address”). If you call 911 using a T-Mobile service we may, if necessary, transmit Your E911 Registered Address to the 911 Communications Center, who may use it to help emergency responders locate you, but you may need to provide your contact information and current location. You agree to update Your E911 Registered Address if you plan on using a T-Mobile service that requires an E911 Registered Address at a different location. You can update Your E911 Registered Address by accessing your MyT-Mobile.com account or by contacting T-Mobile Customer Care.

Change billing address on your account

Your billing address may be updated automatically if you changed your address through the United States Postal Service (USPS). The USPS notifies us of any address changes.

Postpaid

Only the Primary Account Holder (PAH) or a Full access line can update the billing address.

Prepaid

1. Go to My T-Mobile and log in to your account. Make sure the line changing the address has master privileges.
2. Click Your Profile.
3. Click Billing Address.
4. Enter the mail and contact information in the appropriate fields.
5. Click Save.