My iMessage and FaceTime suddenly stopped working with my Apple ID on my Macbook Pro (OS X 10.9.5) during my vacation at NYC.
Even on my iPhone (iOS 10.3.3) I can now only use iMessage and FaceTime with my phone number, but not with my Apple ID independent from my location.
Everytime I try to activate iMessage and FaceTime on my MacBook and my iPhone following error is shown:
An error occurred during activation
I've checked my Date & Time settings and the current location to be true, reset NVRAM and checked all my settings, but there is no solution in sight. I also deleted my Apple ID accounts from all my Apple devices and reconnected them after a reboot of each device, like recommended by Apple and several other webpages.
Does anyone know a possible solution, or has similar problems?
I don't want to update my Mac or iPhone. The solutions provided to the question Messages won't let me sign in to iMessage suggesting to clear NVRAM and to delete the keychain don't work for me, and iMessage and FaceTime do work but only with my phone number.