Hi,

 

I have an 02 XDA Exec which is actually a 'Universal' made my HTC.  Several other companies, apart from 02, sell them iMate and QTek for example. The O2 model has very old software and cannot do push email nor can it support Bluetooth stereo headsets.  However you can upgrade roms - all the instructions can be found here: 

 

there are also many threads on setting up push email and general issues with all the pda/ phones made my HTC.

 

If you are having problems with Push Email etc or want to realise the potential of your device then I recommend having a look.