The phone number associated with your Snapchat account can be changed. New Snapchat accounts can also be created without entering a phone number at all.
To change the phone number associated with an existing Snapchat account:
1. Open the Snapchat app, login and tap the Settings icon in the upper right corner.
2. Tap Mobile # under My Account.
3. Enter a different mobile number in the text field.
Currently the username on an existing Snapchat account cannot be changed.
The official support document from Snapchat states:
For security reasons, it is currently not possible to change the username for an existing account. If you wish, you may delete your account and create a new one.
Worried that your Snapchat account information was hacked? 4.6 million Snapchat account phone numbers and usernames were recently leaked in a data breach. The database was published this week, detailing all of the affected account information.
To check and see if your Snapchat account information was leaked:
1. Navigate to one of these websites: GS Lookup - Snapchat or Snapcheck.org.
2. Enter your Snapchat username or phone number and submit.
Now that over 4 million Snapchat usernames and phone numbers have been leaked due to a security breach, some iPhone users are interested in leaving the service for good. If you wish to delete your Snapchat account, the process can be completed in just a few steps:
1. Open the Snapchat app, login and tap the Settings icon in the upper right corner.
2. Navigate to Support -> Learning the Basics -> Delete an account.
