A friend of mine just switched from iPhone to Android. He can text me without any problem, but I can't text him at all. I have tried everything I can think of but no message will ever reach him. They are of course transmitting as SMS since he is no longer on iMessage.
The strange part is, my wife's iPhone (4s running iOS 6) can text him perfectly fine, no problem at all, so whatever is happening seems to be on my end.
Any suggestions on how I can sort this?