This happened to one fo my cousin from my mom's side of the family. The older brother of the person that this happened to and I do hang out a lot. he told me about his little brothers experience with something they can't explain.
One time his little brother and one of their nephew went to check out some grils a town 45 minutes away from where we live. May I say this first, this happened in California. Anyways, him and his nephew went and rented a room at the motel. I forgot which motel this was. After they rented the room, they went and put their things in the room and left for dinner.
After dinner and while they were heading back to the motel before they started out to go see the girls they've went to see. While they were driving back, they saw a hot looking vietnamese chick walking on the sidewalk. They asked if she wanted a ride. Stupid them for picking her up. She could've been an undercover. Anyways, they've picked her up and took her back to the motel. She was really good looking with a nice body, but she hardly spoke. She would only answer what they asked.
She was with them for a couple of hours jsut hanging and god knows what they were doing. Towards the end before she left, she was playing with my cousin's brother's phone. He left his phne on top of the TV and she grabbed it and started playing with it.
After she left, my cousin's brother wanted to know what and why she was playing with his phone. It appreared that all his contacts have been erased. He was pissed know that she erased all his contacts. Later that night they went to visit their girls and came back home.
On their way back home, his phone rang and a number he wasn't familiar with shows up on the caller ID. He picks up the call but there's nothing behind it...he would ask who it was but nothing....it did this the entire way home. Next day it did the same thing, so he decided to return the call. He would dial the number and the operator would say that the number he's dialing is not correct. This happened everytime he calls back. This kept on for a couple of days until he was getting creeped out coz everytime he returns the call to a number that's not correct...but it shows up on his caller ID....
After he told his older brother (the guy that i hang out with) and his older brother tried calling that same number back on his phone. When he called back the operator said that number does not exist (it's sort of in that sense). OK so now they were getting all sorts of weird thoughts. He asked his little brother what happened and after he was told what happened, he was advised to just get rid of the phone. His little brother smashed the phone and went and got a new one.
A couple of days later after he got his new phone, that same number called again....I don't know what happened after this coz at the time i was told of this it was still going on and I haven't asked since then...
It might be a prank but how can one explain the callbacks to a number that isn;t correct....