The Android 4.1 (Jelly Bean) update for the Samsung Galaxy S3 is expected to arrive shortly after the IFA Mobile Unpacked event on 29 August, where the South Koreans are expected to unveil the Galaxy Note 2.
However, regardless of the official updates, XDA developers continue to release their own ROMS, with the most recent being an Android Open Source Project (AOSP) ROM called BlackBean. This is based on the Android 4.1.1 and is compatible with the international version of the Galaxy S3 (model number i9300). The ROM reportedly uses both LiquidSmooth and Cyanogen Mod 10 bases, according to Best Android Tips. The report adds that ROM features include customisable battery icons, a dynamic changelog and overclocking and undervolting.
Galaxy S3 owners looking to install the BlackBean ROM can do so by following instructions below. However, IBTimes UK warns users of the possibility of developer bugs and urges the back-up of all important data and APN settings before proceeding. In addition, users are advised to install USB drivers and ensure USB debugging mode (follow the guide here). Ensure ClockWorkMod (CWM) Recovery is installed and check build number of device - this ROM is compatible only with model number i9300.
Steps to Install CM10 Nightly Android 4.1.1 for Galaxy S3
Power off Galaxy S3 and restart in CWM Recovery (to do so, simultaneously press and hold Volume Up, Home and Power buttons till a warning message appears and then press Power to enter CWM Recovery)
Back-up existing ROM (to do so, navigate to Backup and Restore > Backup) and return to main Recovery menu after completing procedure
Select Wipe Data > Factory Reset and confirm data wipe (this may take a few minutes)
Navigate to SD card and select BlackBean ROM to start flashing firmware
Once ROM is flashed, return to SD card and select Google Apps package
After installation, navigate to recovery menu and reboot system to load into new BlackBean ROM
Note: To restore previous ROM, boot Galaxy S3 into Recovery, navigate to Backup and Restore and restore desired ROM by selecting it
Congratulations... the Samsung Galaxy S3 is now running BlackBean Android 4.1.1-based ROM.