He tricked himself :)

has nobody realised that he's texting with no sim - i am confusion

Lol this happened to me once, when I got my first phone, it was on my grandma’s T-Mobile and once I was asking her where she was since she went to get get some pizza, and I was like “yo wtf is happening” and it took me an hour to realize

How can you even text yourself-

U just click new text and put in ur phone number