Can i use a verizon razr with my att account?

Is it possible to take a verizon phone originally from verizon to at&t and use it? I currently have an iphone 4s with at&t but want to use a verizon razr phone

Extremely difficult. Requires full rooting and some serious ROM hacking to hack the GSM module which is coded to NOT work in the US. NOT recommended. Buy the Moto X instead.