Is this illegal i don't think so?

OK so recently I plugged my ipod touch 4 into my coumpter and iTunes thought it was an iPhone for some reason so I just kinda ignored and synced my music when I unplugged my iPod and it said at the top at&t five bars and I had the phone app so I called my mom and it worked sorry for typos if there's any

I don't think so but you are extremely lucky I wish I could do that with my iPod

Hmm It might be in some shape or form

That doesn't seem possible, because the iPod doesn't even have the antenna and physical components to make the call, but it's cool if it worked.

Technically, it won't be illegal.