When I was about to call to my friend using my outgoing calls list yesterday, I saw my own cell phone number, which couldn't have been, on it. Looking at it carefully, I was surprised at the number!! It wasn't my number, but it was very similar to mine.
For example, if mine were 090-1111-2233, it would have been 090-1111-2232.
Then, I recalled what happened the day before.