Can I install a SIM card in an iPhone 5s?

My phone is a Verizon 5s with a SIM tray. Where is the information about the phone s carrier stored? I was on a family plan but they stopped paying the bill. I want to transfer the phone to another carrier, preferrably without a contract. How do I get rid of Verizon, seeing as how it seems to be disconnected anyway?

Yes. You actually need a SIM card in order for the phone to work correctly.

Here are the instructions: https://support.apple.com/...s/HT201337

Since it is a Verizon phone, it should already be unlocked; you simply put in a different carrier's phone and it should accept it with no problem.

Yes