Can I sell my 'lost' iPhone?

I really thought I lost my iPhone, so my carrier gave me a new one. Weeks later, the iPhone turned up found and I don't know what to do with it. Can I sell it?

Just give it to me

If you used the insurance then the insurer owns that phone. You probably got paperwork that tells you what to do if you found it.

You can but its worth very little because its now blacklisted and can't make phones calls… And you better tell them that when you sell it unless you want them showing up at your house some night with a baseball bat.

Not if you bought it via a contract with your carrier.