Google has recently launched a service called GoogleSync that lets you sync your mobile phone contents such as Contacts and Calendar with your Google Account. Once synced, you can make changes on either your mobile phone or Google account, the change will take place both way.
This can come handy if you use both Google Calendar and the Calendar in your mobile phone, when you make changes to the Google Calendar, the change will automatically take place in your Mobile Calendar and vice versa. The same goes for Contacts as well.

Supported mobile phones are iPhone, Blacberry, Nokia S60 and E series(running S60 3rd edition), Sony Ericsson, and Windows Mobile. To set GoogleSync in your mobile, visit the following URL from your mobile web browser.
m.googe.com/sync
Google has a great illustration explaining how it works.

Watch this official Google video to get a better explanation on GoogleSync.
Enjoy!




