The Problem
iMessage is a feature for messaging between iOS devices. A problem arises when a user switches to another operating system, such as Google Android, but keeps the same phone number.
An Example
Kate and Henry both have iPhones and both of them use iMessage. Kate decides to trade-in her iPhone for a Samsung Galaxy. That night, Henry texts Kate some information. (Seems simple enough)
Neither Kate nor Henry are aware there is an issue. To Henry, the text went through because iMessage said it did. Kate never got the message because iMessage doesn't work with non-iOS devices.
How to disable iMessage for a device that is no longer needed
- Go to https://supportprofile.apple.com
- Sign in with the Apple ID the device was registered under.
- Click on Edit Products
- Click on the X to the right of the device.
- Click Unregister
