Yesterday I installed iOS 26 on my iPhone as a beta tester. At first there was no problem, but during the afternoon I noticed that neither FaceTime nor IMessage worked... I tried to go through the settings as described by Apple Support, but my phone number would not activate. Sometimes I was even asked to activate iCloud. I always get a REG-RESP message. Does anyone have any ideas what the problem could be?
For help with FaceTime, please post in the Apple Support Community. The Apple Developer Forums are for questions about APIs and features intended specifically for developers.