How to Change Cell Phone Numbers With T

1. Call T-Mobile at 1-877-453-1304. You can also dial 611 on your cell phone to get to the customer service.
2. Tell the customer care representative that you would like to change your cell phone number. The T-Mobile representative will do what has to be done to change your number. If you're on the phone as your number is being changed, the call may drop. It can take anywhere between one minute to 24 hours for your number to be changed. A free text message will be sent to you with your phone number. If you ever forget your number, you can dial #NUM# on your phone and press 'Send.'
3. Inform all of your friends and family about your new phone number. You can send a mass text message to everybody in your address book. Sending a mass text message will depend on your phone's specific features. Most phones allow you to open an option's menu by clicking on one of your contacts. In this menu, you should see a 'Mark All' option. Select this option and then compose your text message. When you send the message, it will go to every contact you marked. It's best to consult your user's manual on how to do this because each phone could be different.