For people not getting the code to show up on your ipad or mac. After having the same problem I noticed for the code to pop up you need to sign into your iCloud account in FaceTime and messages on all devices. Then enable both your phone number and your iCloud account mail as receivers. I had to do this for both sms relay and now call forwarding. On 8.0.2 all you had to do was sign into your iCloud account and just enable your phone number for iMessage and call forwarding to work. As I only want to be contacted by my phone numer on both FaceTime and iMessage and not my email. But this in no longer possible for some reason. Does anyone have the same problem? It doesn't matter in a way since I will still get all my messages etc.