La guida la trovate qui:
http://www.google.com/support/mobile/bin/answer.py?answer=98230&topic=15015
Select ‘Synchronization > Settings’ from the ‘Options’ menu. This will open the Sync application.
From the Options menu select ‘New sync profile’
Choose any name you like for ‘Sync profile name’
Select and click ‘Applications’
Note: You will see a list of all content types that your phone can synchronize; however, currently Google Sync only supports Contacts.
Select and click ‘Contacts’
Make sure the ‘Include in Sync’ option is set to ‘Yes’
Define the ‘Remote Database’ option as ‘contacts’.
It needs to be spelled exactly like this (lower case), or Google Sync will not work.
Click ‘Back’ to exit this screen and save your settings
Ensure that only Contacts have ‘Settings defined’ and all other content types say ‘Sett. not defined’
Click ‘Back’ to exit this screen and save your settings
Select and click ‘Connection Settings’
Enter the following values:
Server version: 1.2
Server ID: Google (capital ‘G’ is important)
Data bearer: Internet
Access point: the Internet access point for your carrier.
Host address: https://m.google.com/syncml (Important to enter https for a secure connection)
Port: 443
User name: your Google Account username, e.g. you@googlemail.com
Password: your Google password
Leave other values unchanged
Click ‘Back’ to exit this screen and save your settings
Click ‘Back’ again to exit the Sync profile settings
Highlight the your Sync profile and select ‘Synchronize’ from the ‘Options’ menu to synchronize your contacts with Google