[dfgas]

how would I take my Us cellular phone and bring it to a different cellular company? obviously my phone is unlocked and running mightyrom. I would think through epst i would have to change settings but i only see 3 settings through there to change. mdn, msid and home sid/nid #1. lets say i wanted to put this phone on verizon or sprint or something. how is that possible?
also considering this is a world phone with a sim card slot in it, is there a way to use it on at&t or tmobile or others like that?