1. Help Center
  2. Custom App Set Up
  3. Apple Developer - Individual Entity Type

Individual Account: Step 3b

Add a MyStudio Test Device to your account

Log in to your Apple Developer account with your main Apple ID, not the new one that you just created, and follow the steps below. 

Enter 4BF51A4A60EB85D848AF7C41E23BD44F44089ADA as Device ID

Review the information and click Register

Click Done to complete the process