How to use one iOS device for multiple 2FA Apple ID accountsWhen you use two-factor authentication with your personal and developer Apple ID, you don't have to register multiple devices.
As of February 27, 2019, Apple requires developer accounts to enable two-factor authentication.
In an effort to keep your account more secure, two-factor authentication will be required to sign in to your Apple Developer account and Certificates, Identifiers & Profiles starting February 27, 2019. This extra layer of security for your Apple ID helps ensure that you're the only person who can access your account.
It can be a bit confusing when you have separate Apple IDs for your personal and developer accounts. Even though one account may already be assigned to your only iPhone or iPad, you can still assign it to a second account. Here's how.
Step 1: Activate 2FA for your second Apple ID on your trusted device
It's not as simple as you might think. Thanks to Johnathan T for coming up with this clever work around.
To enable 2FA for a second Apple ...
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How to use one iOS device for multiple 2FA Apple ID accounts
