Can I give my boyfriend my Sprint iPhone even though he has AT&T?

I have an upgrade for Sprint on November 1st and I'm switching to an iPhone 5S (I have a 4) and my phone works perfectly fine. Can I give my iPhone to my boyfriend and somehow get it activated with AT&T even though it's a Sprint iPhone?

No you can't.

Nope. Sprint runs of what is called a CDMA network while ATT is a GSM based network. There's no possible way to get any phone from either company to work on the other company.

Sorry.

Hope this helped.