Androidtalk.us Thunderbolt Jelly Bean Rom is another great Custom Rom for your Galaxy S2 I9100. It it based on Android Jelly Bean 4.1.2 and it comes with 4 different launchers: Apex, Nova, Stock Jelly Bean, TouchWiz UX, or Experia Launcher. Another good feature of this Rom is that you will have in settings full AOKP ROM Control options and allot of useful apps. With this Rom you can select from 3 different Kernels: siyah, doriminax, CM10 in AROMA. If you install SetCpu app you can overclock your device up to 1600 MHz.