How can I tell if I'm blocked or their iPhone died?

General
4

Ask a mutual friend to message or call them.

If the friend reaches them fast, your number is likely blocked.
If the friend also fails, their phone is likely off or dead.

Make it simple.

  1. Pick one trusted mutual contact.
  2. Ask them to try once, no pressure.
  3. Compare results with your experience.

This avoids guessing from call behavior and gives you a clear signal.