[iphone] Adding devices to team provisioning profile

This is what worked for me in XCode 7.3

  1. Login to developer.apple.com
  2. Add the device.
  3. Head straight back to XCode (DO NOTHING) and create the .ipa
  4. Install the build on the device, it will work.

I have no idea how this worked since I didn't download a new provisioning profile which included the newly added device, neither did I touch anything in XCode after adding the new device. That's Apple magic for you.

I will try to add an explanation to this if I find one.