There’s a bug in iOS 12 Beta 2 which might delete your number from iMessage after installing the Beta 2 update on your iPhone.

Multiple users over at Reddit have confirmed this problem, and thankfully, there’s an easy fix as well for the issue.

  1. Go to Settings » Messages.
  2. Turn off iMessage on the device.
  3. Turn on Airplane Mode.
  4. Power Off your iPhone and then turn it back On.
  5. Go to Settings » Messages, and turn on iMessage.

That’s it.