On a per-call basis, you can’t beat *67 at hiding your number. This trick works for smartphones and landlines. … The free process hides your number, which will show up on the other end as “Private” or “Blocked” when reading on caller ID. You will have to dial *67 each time you want your number blocked.
When you call a dead phone does it ring?
Answer: A: With a dead battery it should not ring but it should go to voicemail directly.