After several delays, Sony Ericsson is finally bringing its Xperia X10 to the year 2010 (just in time for 2011) by giving its users Android OS 2.1. Starting on Sunday, October 31st, Sony is going to roll out the over the air software in small segments to its users and gradually increase the adoption rate throughout November. So don’t be surprised if your Xperia X10, X10 Mini and X10 Mini Pro does not notify you for an update as this will be a month long transition.

Hit the jump for a list of changes Xperia 10 owners will get from Android 1.6 to 2.1.

Xperia X10:

• HD video recording (720p) with continuous auto-focus for high quality videos

• Upgrade of the Android platform to Android 2.1

• New back up and restore application, with extended content back up

• 5 homescreens for apps, widgets, shortcuts and folders

• Social phonebook which automatically syncs contact pictures from Facebook and shows when your friends are online

Xperia X10 mini and X10 mini pro:

• Improved Bluetooth functionality with support for sending and receiving pictures, contacts and more

• New backup and restore application with extended content back up

• Automatic synchronization of your contact pictures between Facebook and your phone book

• Improved ways of handling pictures, audio, text and numbers in your messages

• Upgrade of the Android platform to Android platform 2.1