Galaxy S II devices will be upgraded to Android 2.3.5, software version T989VUVKL1 that includes the following enhancements:
Caller ID enhancements
Wi-Fi calling enhancements
The upgrade will be sent Over-The-Air (FOTA) and will also be available via Kies Mini. This is great news for both HTC Amaze 4G and Galaxy S II owners as they finally have the awesome option for Wi-Fi calling.