Good tip. I wondered why Text Message Forwarding was not working the past few days. Just checked my iPhone, and sure enough my phone number is no longer set as the Start New Conversations From, or the You Can Be Reached By Message At. Phone number shows up in the latter though.
Originally Posted by Heisenberg
Turned off iMessage, and powered down phone. Powered up phone, signed back into iMessage, and immediately my phone number was recognized for the relevant Messages settings noted above. What's strange now is that I don't see the option to setup Text Message Forwarding. Received the popup message on my MB Air that iMessage has activated on my phone. Will try to troubleshoot more tomorrow and get the Text Message Forwarding option available and working.
Update: Restarted iPhone. Now Text Message Forwarding option shows up, and was able to setup with Messages on the Mac side.