TrustedReviews looked at the Samsung SGH-X830
The Samsung SGH-X830 looks more like a portable music player than a phone – it is tall, thin and undersized for a mobile – the dimensions are 84 x 30 x 19.9mm. It weighs 72g, which is less than any mobile I can remember seeing and supports MP3, ACC, ACC+, e-AAC+, WMA file formats.Samsung SGH-X830 Review