This phone still is denoted as "prototype" but it has processor of 624 MHz - no other Windows Mobile phone features such fast processor - and it has built-in 8GB hard disk.
Powered by Windows Mobile 5.0 for Pocket PC Phone Edition
processor: Intel Xscale 624 MHz with graphic accelerator 2700G3 and Video RaM
connectivity standards: GSM quad band / GPRS / Wi-Fi 802.11b / EDGE / Bluetooth 2.0 / GPS / IrDA FIR 4 / USB
card slot: micro-SD
RAM 512 MB, ROM 512 MB, hard disk 8 GB