In the event that you need to replace your Myzone belt, it is not necessary to register a new account, you can simply enter in your new belt serial number in your existing account profile settings. Here's how:
Step 1: Access your profile settings straight from your Myzone app. Click on the cog located in the upper left corner of your home screen.
Step 2: Click on My Profile, then scroll down to Belt ID. Enter your new belt serial number in the Belt ID field.