Good to know
: When you change numbers, your voicemail changes too. We can’t transfer your messages, so be sure to write down any important messages before you switch.
Here’s how to make the change on myAT&T:
- Go to Mobile number change.
- Scroll to and choose the device you want to change the number for.
- Follow the prompts to get a new number.
We'll prorate your monthly service charge between your old and new numbers.