I stick with Nokia, because I am hard of hearing, and Nokia have a good track record for making mobiles that can be used by hard of hearing people.
Uhh, I have a nokia 6125 (European Edition), I also have a Treo 750 (Windows Mobile) =) AT&T Wireless ;D
sony-ericsson k800i (in which I have found even more features than the massive amount of features I already knew) combined with a 2-year vodafone account. 18.50 first nine months, 22.50 the other 15 months, 150 min/sms.
A Nokia E70 thanks to this man. The service is pretty good too, considering I live in the middle of nowhere.