Could this help?
Released on 9 February 2011, Android 2.3.3 included several improvements and API fixes.
Version 2.3.4 introduced support for voice or video chat using Google Talk.
Released on 25 July 2011, Android 2.3.5 included a number of system enhancements:
Improved network performance for the Nexus S 4G, among other fixes and improvements
Fixed Bluetooth bug on Samsung Galaxy S
Improved Gmail application
Shadow animations for list scrolling
Camera software enhancements
Improved battery efficiency
Sent from my GT-S5660 using XDA App