Don't remember the phone but I remember it was with Cingular, and with a discount through my employer. Per-minute charge starting with the first minute, but the phone was for emergency use only so I could live with that.
Funny part was that I was supposed to get a credit to make that phone free, but the credit never showed and when I called to follow-up on it the rep saw that there was an offer, but couldn't apply it so they gave me a month's free service. It would have been cheaper for them to figure out how to give me the credit to start with because I made sure to use only that phone for the month it was free and at a per-minute billing cost, I racked hp a huge bill that they then forgave.