Here are some of the improvements:

• SSU (seamless software updating) allows for updating OS components and doesn’t require the previous version to be uninstalled
•     Over-the-air (OTA) allows for updating via Wi-Fi and WiMax connections
•     The email client changed its user interface and acquired new features
•     Chinese fonts were added to the system font list
•     A good deal of OpenSSL bugs were fixed
•     Browser bugs were fixed
•     A-GPS support was added in the N810 and N810WE
•     Wayfinder GPS application was updated

The most significant features from this list are SSU (seamless software updating) and Over-the-air (OTA). They make the process of upgrading software comfortable and keep the user data retained.