My friend has an older IPhone that is stalking here. I saw this last night and could not believe it. Her phone was ringing but her screen showed her home screen only. I looked at her call history and nothing! They are an elderly couple and these calls wake them. She cannot block a call that is not showing up. She went to her Verizon carrier and they said they could not help. When she suggested police, Verizon told her it was a waste of her time. One caveat , she has her landline forwarded to her mobile phone. Please advise..