Just ordered an upgrade from O2 to Xda IIi.
The cost varies from £0 to £200 depending on your use history - the more you've spent on calls the less it costs. Initially they asked me for £200 but after speaking to Customer Retention and threatening to leave it came down to £100.
Tri-band Phone/PDA - GPRS - Bluetooth - WiFi - 1.3Mp camera.
Believe the screen is 320x240.
In addition to Excel & Internet I want to use it with Tom Tom Bluetooth / Traffic (GPRS)
The Xda IIs offered at the same price has a Quad-band phone (850), only 0.3Mp camera but a qwerty keyboard which I found impossible to use without the stylus (Shrekfingers) so may as well just use the on-screen keyboard. Less memory & slower CPU.
Haven't rcvd the machine yet so no idea how it will work in practice. Suspect the Psion 3a screen and abilities will be missed.