I updated my Apple ID today, but my screen in my Iphone settings under my name still shows my old email address instead of the new one I used as the new Apple ID. How long does it take for the phone to recognize the new ID and change the email address?
It doesn't change automatically. You have to change to the new update.
If you have changed your ID, have you followed the steps in this article on all devices/computers? Make sure you turn off Find My Phone before signing out of the old ID. Once signed out and Find My Phone is off, then sign in with the new ID, then turn Find My Phone back on.
What to do after you change your Apple ID or password - Apple Support. *. I suggest you do this before changing the ID and/or password.
New Apple ID not showing yet
