Calls go straight to voicemail after one ring or no rings
Text messages stay green instead of blue
iMessage texts show no “Delivered” or “Read” status
FaceTime calls do not connect
You cannot see the person’s online status in apps that normally show it
Their contact photo, name, or profile updates may stop appearing
Repeated calls at different times still behave the same way
Messages may appear to send normally but never get a response
You may be unable to add them to group chats or calls in some cases