Would an Unlocked google android phone work with the sim card of a pay as you go at&t?

I'm trying to decide if I should buy a google android phone from e-bay but I need to know if it would even work with the SIM card of a pay as you go phone from at%26amp;t|||I'm pretty sure most android phones don't use sim cards (verizon i know for sure doesn't) so I doubt your plan would work.|||It depends on the phone but it should do.