HSDPA units with a 3G( NEXT G) SIM Card will automatically get date and time and TIMEZONE from the Provider Network. Also setting date and time can be done when you connect via ActiveSync.
1. Connect your device to your PC and wait until ActiveSync is finished syncing.
2. Open the ActiveSync window on your PC and go to the Tools ->Options screen.
3. Make sure Windows PC is highlighted; it's the first item in the Options list. Then, click Settings to go to the PC Settings screen.
4. Check or uncheck the box labeled "Synchronize Pocket PC date and time upon is connecting.”
5. Click OK.
Note: This is not available when connected as a guest.