Apple ID

Use a different Apple ID for each phone, for iCloud, Messages and Facetime.

You can use the same Apple Id for iTunes & App stores, if you want to access your purchases on both phones.

You'll need to sign out of each service and sign in with a different Apple ID on one of the iPhones.

Sign in with your Apple ID - Apple Support

@donv, your links address what to do to change the email address used for a specific Apple ID, they do not have anything to do with changing the Apple ID being used on a device.

They both must have the same Apple ID. You will need to change the Apple ID on one or both of them:

Change Apple ID: https://support.apple.com/en-us/HT202667

What to do afterwards: https://support.apple.com/en-us/HT204071

I did, and know those links well regardless. Read the links yourself, they generally deal with changing the email address used for the Apple ID, it does not address changing the Apple ID being used on a device specifically.

The first line of the first link: Follow these steps to change the email address or phone number* that you use as your Apple ID.

That just changes the email address associated with the Apple ID, it does not create a new independent Apple ID, it still the same Apple ID, just with a new email address.

The second link is applicable, once the new Apple ID has been created.

We will have to disagree. An Apple ID has two components, a username/email address and a password. If you change either component, you have changed your Apple ID. Note that the title of the first read is "Change your Apple ID." The headings down the page in the read refer to subjects related to changing Apple ID over and over. The contents between the headings refer over and over to changing Apple IDs.

You reference only one thing that you think supports your view: Follow these steps to change the email address or phone number* that you use as your Apple ID. That wording is incredibly poor. It implies that one's email address or phone number is his/her Apple ID. Certainly that is not true. And, as said, you can't change anything about an Apple ID without changing the Apple ID.

donv (The Ghost) wrote:

We will have to disagree. An Apple ID has two components, a username/email address and a password. If you change either component, you have changed your Apple ID.

You would have changed a part of the Apple ID, but the Apple ID itself still is the same Apple ID. The email is merely a string for easy identification of the Apple ID, changing the email or changing the password, does not in any way make it a different Apple ID.

It will remain tied to your purchases, subscriptions, icloud content etc... and will continue to make the calls and other content be the same on both devices. Since it is in fact the same Apple ID.

You are just editing the Apple ID, you are not making one device have a different Apple ID to the other.

Both devices will then be using the edited Apple ID, and all content will continue to be the same on both devices.

In fact changing the email on one device will force you to sign out of the Apple Id on the other device, and sign in again with the new email or password.

I think your point about editing an Apple ID is right and that signing in to things, etc., remains the same if just editing. I should not have said: "An Apple ID has two components, a username/email address and a password. If you change either component, you have changed your Apple ID." What I said was too vague. I was clumsy in getting at the idea that if you change the @ part of an Apple ID, then you end up with a third-party Apple ID, one such as name@yahoo.com.

I have enjoyed our our discussion. Friends? Let's put it to rest.

donv (The Ghost) wrote:

I think your point about editing an Apple ID is right and that signing in to things, etc., remains the same if just editing. I should not have said: "An Apple ID has two components, a username/email address and a password. If you change either component, you have changed your Apple ID." What I said was too vague. I was clumsy in getting at the idea that if you change the @ part of an Apple ID, then you end up with a third-party Apple ID, one such as name@yahoo.com.

I have enjoyed our our discussion. Friends? Let's put it to rest.

Correct. Friends. Just trying to clarify for the OP.

What you say is incorrect. Did you click on the links.