Galaxy S2 I9100 can be installed with a Custom ROM based on Android 4.1.2 Jelly Bean named as Resurrection Remix ROM which is based on AOKP and CM10.1 and provides you better customization and features. The ROM comes up with features which includes aroma installer, multi users options like NEXUS 7, hardware keys options and much more. Resurrection Remix ROM is a Custom ROM and not an official update from Samsung, there may be bugs and issues.
The guide mentioned below is only for Galaxy S2 I9100 and not for any other device. You can check Model number of device by going to Settings >> About phone.
We cannot be held liable of any damage done to your device while following the below mentioned procedure.
Install Resurrection Remix ROM Android 4.2.1 ROM on Galaxy S2 I9100
Take a complete backup of data,apps and settings as the procedure may wipe your data.
Make sure that the battery of device has a minimum charge of 60%.
Enable “USB debugging” on your device by going to Settings >> Developer options >> Enable USB debugging.
ClockworkMod Recovery should be installed. Guide to install ClockworkMod Recovery on Galaxy S2 I9100.
Copy both the zip files to SD-Card of your device without extracting.
Switch off device.
Boot into recovery. Press and hold down the Volume Up, Volume Down and Power buttons to enter recovery.
Select “wipe data/factory reset” and wait till the data gets wiped completely.
Select “wipe cache partition” and do the wipe.
Open “advanced” option and “wipe dalvik cache”.
Perform a Nandrop backup of your existing ROM. Select “Backup and Restore” and then select “Backup” again. Now, go back to main recovery menu once backup is complete.
Select “install zip from sdcard” and then select “choose zip from sdcard”. Navigate to “Resurrection Remix ROM” file which you have downloaded and confirm to “install”. Wait till it gets installed.
Repeat the procedure to install Google apps by selecting “choose zip from sdcard” and then select “Gapps.zip” and install.
Select “reboot system now”.
Resurrection Remix ROM Android 4.2.1 ROM on Galaxy S2 I9100 is installed.