I had this phone lately, a Nokia 6630, vodafone from japan.
I can't play mp3's, always says, unsupported file
neither can I install applications...
Is that really like that? huh?
Some geniuses already came out with a software that allows these BB5 phones to have an open line. I had my 6630 "flashed" for about US$13.00. Any self-respecting cellphone technician could open your 6630's line.
You could also reformat the phone.