At present official ICS firmware is on the market for Samsung Galaxy S2 and a excellent news for S2 users is Samsung has announced official Jelly Bean 4.1 replace for many units including this device. Samsung has began rolling out JB 4.1 update for high finish gadgets like Galaxy S3 etc. however nonetheless it’s not available for Galaxy S2. And it will take some extra time as Samsung is testing this firmware earlier than releasing it for Galaxy S2.
Meanwhile Google has launched an upgraded model of Jelly Bean having Android model 4.2. In this Google has tried to included many missing features from previous model that’s Jelly Bean 4.1 and plenty of enhancements are also there. It includes many features like daydream, actionable notifications, photosphere digicam, good keyboard with gesture typing, magical widgets and a new look for Google Search. Quite a lot of wait is there for S2 customers to get Android 4.2 officially.
Procedure to Upgrade Galaxy S2 I9100G with Cyanogenmod 10.1 (based on Android 4.2):
- Get latest version of Cyanogenmod 10.1 from the Official development page.
- Here is the link to Official development page.
- Since Google Apps are not pre-installed in this ROM you have to separately download them and flash them.
- Here is the download link to Google Apps for CM 10.1.
- Once you download this ROM package connect your phone to PC and transfer it to external SD card and do not extract it.
- Disconnect the phone from computer. Now boot into the recovery mode. To do so, turn off the phone completely (until it vibrates). Press & hold Volume Up + Home button + Power Key together until recovery mode appears (you can release power button after Samsung logo appears but keep holding other two until you are in recovery mode).
- Once you are in recovery mode, first thing you need to do is take a nandroid backup of your current ROM so that it can be restored back in case if anything goes wrong. To backup your current ROM, select Backup and Restore option from the recovery menu & on next screen, select backup. Now It will make a nandroid backup of your whole system (excluding SD card). Wait until the backup process to get finished.
- Select wipe data/factory reset & wipe cache partition to wipe all the data & caches from the phone memory respectively.
- Now Select “install zip from sdcard” & then “choose zip from sdcard“. Select the ROM file from the location where you’ve copied it earlier & selecting on Yes, confirm the installation.
- Wait for the ROM to get installed. After ROM gets successfully installed, your phone will land in the recovery mode.
- Follow the same procedure to flash Google Apps.
- Now you are ready, Select reboot system now to restart the phone and boot into CyanogenMod 10.1.
Note: If you want to go back to your previous ROM, you can do so by entering into the recovery mode. In recovery, select Backup and Restore option & on next screen, select restore. Now select the backup you want to restore.