After a long wait, Samsung has finally started rolling out the Android 4.1.2 Jelly Bean firmware update for the T-Mobile variant of the Samsung Galaxy S2 with the model number SGH-T989. Users of the T-Mobile Galaxy S2 can officially update their device through Samsung Kies or by using over-the-air updates. But since the update is still in process, it may take some time to reach all supported devices. In case you are using a custom ROM and cannot officially update the Galaxy S2 or if you do not see the update available for your device, you can download the firmware and try out the manual installation procedure explained below.

Jan 24, 2013 - samsung galaxy s2 android jelly bean update download. To install the downloaded firmware, you need to flash the firmware manually using. On Android 6 Marshmallow as compared to Android 4.1.2 jelly bean. Download Cyanogenmod 13 Android 6 Marshmallow firmware file from here. Your experience of Android Marshmallow on your Samsung Galaxy S2.