O2 Xda
The O Xda brand was a range of Windows Mobile PDA phones, marketed by O, developed by and manufactured by multiple OEMs (mainly HTC, Quanta and Arima). The first model was released in June 2002. The last models came to market in 2008. The "X" represents convergence of voice and information/data within one product; the "DA" stands for "Digital Assistant", as in PDA. The name of "XDA Developers" is derived from it. Retired models. Xda. The first product released in the XDA range. Xda II. The successor to the Xda, the Xda II, was released in November  2003. Xda IIi. The Xda IIi was released in February 2005. Xda IIs. The Xda IIs was released in November 2004. O2 Germany released the device as Xda III. Xda IQ. The Xda IQ was released in 2005 and runs Windows Mobile 5 Smartphone Edition. Xda Exec. The Xda Exec was released in July 2005 and is the first Xda to run Windows Mobile 5, with highest speed processor at the time. ROM upgrade available at for UK/Irish users. Only released in Europe. Xda Mini S. The Xda Mini S was released shortly after the Xda Exec, and was  the second Xda to run Windows Mobile 5. Xda Atom. The Xda Atom is the latest Model to be released in Asia. It runs Windows Mobile 5 and has approximately the same dimensions as the Xda mini, but has much improved features. The Xda Atom was released in Asia-Pacific region only. Xda Neo. The Xda Neo was launched by O2 Germany at the CeBIT show in March 2006. Its shape and size are very similar to those of the Xda II mini. Xda Trion. Announced in May 2006, it will be the second 3G-enabled model in the xda  range. Like the Exec, it will have two CMOS cameras - a VGA camera on the front for video calls, and a 2-megapixel camera on the back. Other hardware specifications are very similar to the ones of the Mini S. Xda Graphite. This candybar sized phone was announced in March 2007 and supports both 3G and WiFi. A ROM upgrade is available on the O2 website for Windows Mobile 6 Xda Stealth. The O2 Xda Stealth was O2's attempt to make a normal mobile phone with GPS while still having full Windows Mobile and PIM Capabilities. This phone  has mostly generated average reviews. XDA Flame. The XDA Flame is the first dual processor PDA-phone announced by O2 in late 2006 and contains enhanced screen graphics, movie playback, photo viewing, and gaming performance. Xda Atom Life. Xda Atom Life is one of the fastest HSDPA 3.5G PDAphones, announced by O2 in early 2007 and has enhanced multimedia capabilities. It also has Windows Mobile 6.0 operating system, the upgrade from WM5.0. Xda Zest. The Xda Zest is an O2 branded Asus P565 handset. The Zest was released in November 2008. It has a 3.2Mp camera, 802.11b/g WiFi , HSDPA, GPS, and 2.8 inch 65k colour touchscreen with a resolution of 640x480 pixels. Xda Serra. The Xda Serra is an O2 branded version of the HTC Touch Pro handset was released in November 2008. Xda Ignito. The Xda Ignito is an O2 branded version of the HTC Touch Diamond handset was released in August 2008. Xda Mantle. The Xda Mantle is an O2 branded version of the HTC P6500 handset and was released in July 2008. Xda Stellar. The Xda Stellar was released on 26 November 2007.