All you proud owners of the
SGSII for
T-Mobile, will be happy to know that there is an update on its way. No, it is not ICS, but still worthy of your time. It is a rather small update that will bump you up to Android 2.3.5 software version T989VUKL1. It brings with is improved caller ID, better battery life and Wi-Fi calling enhancements.
This is not a required update and you don;t have to update your device f you choose not to. You can skip the OTA notification and install it via Kies Mini at any point after Dec 15th. As with most updates it may take a few weeks for all devices to get the chance to update.
Source:
Tmonews