Samsung has unveiled a hard-disk-based SPH-V7900 mobile phone which sports a staggering 3GB hard disk drive. Offering twice the capacity of its predecessor, the SPH-V7900 also boasts two cameras (one with 2-megapixel resolution), dual screens and twin speakers in a twist-flip housing, and the main TFT LCD screen has QVGA (240x320 pixels) resolution. There's also an MP3/video player onboard, and the whole thing measures 103x52x27.6mm and weighs 165g. Samsung claims 4.5 hours of talk and 200 hours standby.