Can I put an O2 SIM card in an Verizon iPhone 4s?

Can I put an O2 SIM card in an Verizon iPhone 4s?

You can try it. Go to verizon website and try to active your phone with it and if not they will send you a new SIM card for free

You could, but doesn't mean it would work.

1. Verizon is a CDMA carrier, they don't use SIM cards
2. The phone would be locked anyway