The easiest way to access your Printful account is to use the backup codes you received during setup.
If you don’t have these codes saved or printed out, you can check to see if you’re logged in on a different device. If you are, you can temporarily disable two-factor authentication under Settings: Security. However, if you’re not logged in on another device, you can still get access to your Printful account when you receive a new phone–as long as you have the same number.
Once you’ve disabled two-factor authentication and you have a new phone, you can set it up again on the Account Security page.