iMessage
I was having major issues on my iPad 2. Somehow Message Forwarding was turned off and when I activated it again, the iPad 2 wouldn't display the code. I turned off iMessage on the iPad 2, signed out, and then it wouldn't let me reactivate it.
What finally worked was signing out of the Apple ID for iMessage, FaceTime, and iCloud. When I signed back in for iCloud, I found that iMessage and FaceTime were already signed back in and the iPad 2 displayed the code when I turned back on a Message Forwarding on my iPhone 6.
- Merg