ASUS has recently announced the ASUS P565 windows Mobile 6.1 Smartphone, which features the 800MHz Marvell Tavor processor. This is the fastest processor ever featured in a Smartphone and therfore makes the ASUS P565 the world's fastest Smartphone. It also comes with some impressive features, which are listed below:

Dimensions: 4.1 x 2.4 x 0.62 inches
Weight: 4.23 ounces
Network: Tri-band (900/1800/1900MHz) GSM, 2100MHz UMTS
OS: Standard Windows Mobile 6.1
Processor: 800MHz Marvell Tavor (PXA930)
Display: 2.8 inch QVGA Touch Screen display with Glide interface
Camera: 3 megapixel autofocus main camera, Secondary VGA-resolution camera for video conferencing
Memory: 128MB of RAM, 256MB of flash storage, MicroSD Support
Connectivity: WLAN, Bluetooth, GPS, USB
Applications: ASUS Today, Anytime Launcher, EziMusic, EziPhoto, PDF Viewer
Battery: 1300mAh lithium-ion battery
Standby time: 250-300 hours with 3G, 200-250 hours with 2G
Talk time: 3 hours with 3G, 4 hours with 2G

Sources: Windows For Devices