I received an unknown call. The person who called me knew my name and claimed to be my friend. He said he had lost his phone and asked me to save his number. When I asked him, "Who are you?" he refused to reveal his identity and replied, "Aiyo, you don't know me? I'm very sad. I've known you for a long time already." However, his voice didn't sound familiar to me at all. I warned him that if he didn't tell me who he was, I would hang up, and he promptly ended the call. Please be careful and do not engage with such callers. It's advisable to block their number immediately.