Changing the Apple ID associated with an iPhone or iPad

To change the Apple ID associated with an iPhone or iPad, see the instructions below.

DISCLAIMER: Apps associated with the original Apple ID will need to be reinstalled in case of updates. All other content will be no longer available.

First, open the Settings app and select iTunes & App Store under iCloud.
Select Apple ID at the top of the screen and choose Sign out to disassociate the device with the ID on the screen.
After being promoted to Sign In, select Use Existing Apple ID, entering the username and password for the new ID.
That's it, you have now changed the Apple ID associated with your device!