AT&T’s Network Down for Some Users, iPhone Owners Unable to Make CallsJuli Clover / MacRumors - 2 years ago
  • Many users have been able to fix the phone call problem by restarting their iPhones, so affected customers should try that right away to attempt to resolve it.
  • If a restart doesn’t work, customers who need to place calls to friends and family members can still use FaceTime or FaceTime Audio.