Log in to your account with your previous carrier, or give them a call.Grab details from your current carrier (See our A to Z list of how to transfer your number by carrier).Make sure your phone and number can transfer to the Mint side.Here are the 3 basic steps to transferring your number: Transfer your number to Mint Mobile in three easy foxing steps You’ll probably want to bring your current phone number along too…which is super easy, btw. The fact that you’re reading this suggests you’ve realized how rude big wireless is and thinking about making the switch to Mint.