For work I've got a Motorola 120t, Plateau is the carrier. Pretty decent phone, doesn't like water. Has withstood abuse pretty well for a cheap phone, my only complaint is having to answer the damn thing (free minutes cell to cell so there's always some dumbass co-worker or boss calling). Hafta lock the keys or it will do some funky stuff on it's own.
For home I've got an Audiovox, not sure the model but has a color screen, we use Cellular One. Had a Motorola 120c before that, same as above, not bad for a cheap phone. The Audiovox has held up so far, LOUD ringer/ringtones, good standby time, good in-use battery time, survived a few drops on concrete, good mic/speaker (a little too good at times; I've gotten some looks from others as my wife was bitchin' me out for something). Cellular One had no reception in Dumont but everywhere else in Vegas, AZ & NM I had no probs.
Still waiting for the Samsung "Matrix" phone...