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Update Galaxy S2 with KitKat 4.4.3 CM11 Custom ROM

Even though Samsung will no longer release official Android updates for the Galaxy S2 I9100, you can still receive the latest apps and features on your phone by flashing the latest version of CM11 custom ROM firmware, which is based on Android 4.4.3 KitKat OS. So, the Galaxy S2 is stuck on Android Jelly Bean firmware as there won’t be any KitKat OTA rolled out for the same. That’s why, if you still want to use your Android smartphone on full power you should complete this guide in order to install CM11 KitKat 4.4.3 ROM on your Samsung Galaxy S2 model number I9100.

The version of CM11 is not official, the firmware being modified by those of xda-developers in order to be compatible with your Galaxy S2. Anyway, don’t worry, as the Android 4.4.3 KitKat software is stable and works without lags or bugs – all the users who have tried this ROM declared the same. Furthermore, CM11 brings various features, apps and capabilities that cannot be found on the default version of KitKat, so by using the same you will be able to customize, optimize and improve the performances and the looks of your Android smartphone.

CM11 also brings a new theme manager, new customization options and several tweak features that can be easily managed in order to personalize the Android interface, to speed up your device, to increase the battery life, or to power up the performances. CM11 will smoothly run on your Samsung Galaxy S2 I9100 and the Android 4.4.3 KitKat firmware will offer all the apps that you want to test and use in order to stay in touch with everything that’s new on the Android system – and for achieving the same you only have to complete this step by step guide.

As you will see during the guidelines from below, for installing CM11 on your SGS2 a custom recovery image will be used. On that matter you should use the latest version of CWM or TWRP recovery as for now the ROM has been tested only by using the mentioned apps. Of course, root access is also required so before going any further ensure that you own a rooted Galaxy S2 that is installed with the latest version of CWM or TWRP recovery. It’s important to apply these procedures, as without doing the same you will not be able to update your phone to Android 4.4.3 KitKat OS.

Moreover gaining root access and installing a custom recovery image represents two essential though unofficial operations. So, by completing the same the warranty of your Galaxy S2 will be void. The warranty can be restored only if you downgrade your phone to stock Android OS using Odin – then the root access will be revoked and the factory restrictions reinstalled, so CM11 will be replaced with stock Android Jelly Bean firmware. Don’t worry, as if you are following dedicated step by step guides, like the present tutorial, everything will be fine.

When using a custom recovery image for installing Android 4.4.3 KitKat CM11 custom ROM on your Galaxy S2, a wipe is being required which means that you can lose all of your data that is saved on the internal storage memory of your handset. Due to same reasons the best will be to complete a backup before doing anything else. Therefore, use backup and restore apps and consider in saving your contacts list, call logs, market apps, internet settings, EFS folder, text messages, personal data, info and accounts and even your current ROM by making a Nandroid backup – you can then restore the firmware if CM11 is not on your taste.

A computer must be near you as you will have to connect your smartphone to the same at some point – also on the computer you will have to download the required files. In order to make things right and for avoiding unpleasant situations from happening, on your computer temporarily deactivate the security protection and on your phone enable USB debugging option by going to “menu – settings – developer options”. Also, you should charge your device before doing anything else – especially if there is less than 50% power left – because if your S2 gets turned off in the middle of the update operation, it might also get bricked.

This step by step guide must be completed only by those who own the Samsung Galaxy S2 model number I9100 – the CM11 Android 4.4.3 KitKat custom ROM firmware is being compatible only with the mentioned device, so be careful and try not to mess things up.

How to Update Galaxy S2 with KitKat 4.4.3 CM11 Custom ROM Firmware

  1. On your computer download the CM11 firmware file from here and the Google Apps package from here; Google Apps are not included on the Android 4.4.3 KK update so you will have to manually install the same on your Samsung Galaxy S2.
  2. Now place these files on desktop and don’t unzip the same.
  3. Connect your smartphone with your computer by plugging in the USB cable and transfer the downloaded files from desktop to your phone’s SD card.
  4. Unplug the USB cord, turn off your device and enter recovery mode on your Galaxy S2.
  5. From recovery first of all, wipe the system and clear cache by selecting: “wipe data factory reset”, “wipe cache partition” and “wipe dalvick cache”.
  6. Good; then go back to main menu of recovery from where pick “install zip from SD card” followed by “choose zip from SD card”.
  7. Select the CM11 file and install the same on your Galaxy S2; then repeat the procedure and flash Google Apps package on your phone.
  8. Wait while the update operation is being completed and in the end from main menu of recovery select “reboot system now”.

Note: if in the end you will get stuck in a boot loop, don’t panic and go back to recovery. From there select “wipe data factory reset” and “wipe cache partition”; then go back to recovery and choose “reboot system now”.

So, there you have it; that’s how you can update your Samsung Galaxy S2 I9100 to Android 4.4.3 KitKat OS by installing the latest build of CM11 custom ROM firmware. Now, just test the new software and see how it performs and runs on your Android smartphone. Also, in the end, use the comments field from below and share your impressions and thoughts with us and with our readers.

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