I bought an iPhone, and the seller left his SIM card in it?

I think he left the SIM card in because it still says Verizon at the top left corner, and it is still picking up 3G here and there. He also didn't even restore it lol. So what should I do? I want to use this with my Verizon account! So if I take out the current SIM card, restore the phone, and bring it to Verizon, will they give me a new SIM card for my verizon account?

Verizon doesn't use SIM cards, so there wouldn't be a SIM card to remove. The only reason the VERIZON would be at the top would be because the phone is not restored, so naturally it's just looking for towers around you but you can't necessarily call. The only reason it would have a SIM would be for world usage or 4G--- in that case the phone should be deactivated, so may have a problem and not be able to be activated or something like that.

Verizon does not use SIM cards. It is a CDMA carrier. As far as it not being restored you could & should through iTunes.

On a side note, not a smart move on his part at all.