With Windows Mobile 6.0, you can enjoy the latest Windows Mobile multimedia and messaging features,
extra functionality, better flexibility and more.
HOW TO UPGRADE
Note: Please Back up or Save any phone information before upgrading your mobile.

Install ActiveSync 4.5.

Install Software Updater driver

Connect your phone to PC via Samsung Mobile cable.

Backup your data using ActiveSync.

Run Software Updater, which will guide you through the installation process.
Before upgrading your phone, ensure this requirements

Back-up the phone data before updating its software.

PC : Microsoft® Windows 2000, Windows XP or Windows Vista™

USB data cable for connection with phone

Internet Connection