O2 launched its original <a href="http://reviews.zdnet.co.uk/hardware/handhelds/0,1000000735,10001359,00.htm">Xda</a> in 2002. At the time it was one of the few Windows Mobile devices with an integrated mobile phone. Times have changed and now it is unusual to see a Windows Mobile device without SIM support. In the intervening period O2 has successfully maintained and developed its Xda series, and the <a href="http://www.my-xda.com/devices/xda_orbit2.jsp">Xda Orbit 2</a> updates the original <a href="http://www.my-xda.com/devices/xda_orbit.jsp">Xda Orbit</a>. Its key features include a GPS receiver and navigation software.