UK-based O2 has unveiled its
XDA II mini PDA phone, described as the world's smallest (with a size of a deck of playing cards). Powered by Microsoft Windows Mobile 2003 PocketPC Phone Edition Second Edition with a 416MHz Intel XScale PXA272 processor, the phone integrates tri-band GSM/GPRS, Bluetooth and a 1.3 megapixel camera. Wi-Fi is optionally available through a SDIO card slot.
Unlike most other smartphones, which run Microsoft Windows Mobile for Smartphones, the XDA II mini is a fully-functional Pocket PC with an integrated touchscreen, i.e. it functions as a fully working Pocket PC with mobile phone functionality.
In Europe, the same phone is sold rebranded as the T-Mobile MDA Compact.