Update and Install KitKat 4.4 on Samsung Galaxy S2 via SlimKat Custom ROM [How to] (Updated 2013/12/16)

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Although the Samsung Galaxy S2 is not expected to get the Android 4.4 KitKat update on it anytime soon, but as always, developers never sleep! yes folks! you got it right, you can now update your Samsung Galaxy S2 I9100 to the latest Android 4.4 KitKat firmware via SlimKat developed by Slimroms.net. So, in case, you also want to taste the stock Android 4.4 KitKat firmware on your Samsung Galaxy S2, then here is a perfect guide for you folks to install KitKat 4.4 on your Samsung Galaxy S2 I9100 and flash the Slimkat (Kitkat 4.4) Custom ROM on your Galaxy S2.
The following method to update your Samsung Galaxy S2 to KitKat 4.4 is not official, the firmware you are going to install on your Samsung Galaxy S2 is regarded as a Custom ROM. It is individually developed by the developers and Google devs are not associated with it. However, the developers of the SlimKat never fail to assure the extra soothing KitKat 4.4 experience provided by it. So without any further ado, let us begin with the flow of the guide in order to install KitKat 4.4 on it.

Things to Remember

  • Installing the SlimKat Android 4.4 KitKat ROM on your Galaxy S2, you will void it’s warranty.
  • Do not flash this custom ROM on any device other than Galaxy S2 I9100 variant or else you will end up bricking your device.
  • Follow the guide really carefully. In any case of misfortune, we will not be held liable for the damage caused.
  • You will be performing wipeouts during the procedure, so mentioned here under are the backups which must be performed.

Backing up your Data

Preparatory Steps

  • Ensure that you have the original USB cable that came with your device
  • Charge your device to at least 50% so it doesn't turn off during the ROM installation
  • Enable USB debugging on your device by going to Settings > Developer Options > USB debugging
  • Make sure you have all the USB drivers installed on your computer to support your Galaxy S
  • After you've completed all the preparatory steps, make the following downloads

Downloads

Steps to Install KitKat 4.4 on Your Samsung Galaxy S2 I9100 via SlimKat Custom ROM

 (CWM Recovery method)

Step 1 - After you’ve downloaded the above listed zip files, connect your computer to your Galaxy S2 and move both the zip files to your phone’s root storage (in plain sight, not in any folder).
Step 2 - You may now disconnect your Galaxy S2 and boot it into recovery mode by first turning it off and then on again by pressing Power Button + Home Button + Volume Up button all together.
Step 3 - Now that you’re in CWM recovery, select Data Wipeout / Factory reset option and wipe the data. Next, select the Wipe Cache and then Dalvik cache from the Advanced Option.
Step 4 - Now go back to the recovery menu and select the Install Zip from SD Card option. Now choose the Mackay Android 4.4 zip file and install it. After that completes, do the same for the GApps zip file and install it.
Step 5 - After that’s done, select the +++Go Back++++ option and click on Reboot system now.

Steps to Install KitKat 4.4 on Your Samsung Galaxy S2 I9100 via SlimKat Custom ROM

 (TWRP Recovery method)

Step 1 - After you’ve downloaded the above listed zip files, connect your computer to your Galaxy S2 and move both the zip files to your phone’s root storage (in plain sight, not in any folder)
Step 2 - You may now disconnect your Galaxy S2 and boot it into recovery mode by first turning it off and then on again by pressing Power Button + Home Button + Volume Up button all together
Step 3 - Now that you’re in CWM recovery, select Data Wipeout option and wipe the data. Next, select the Wipe Cache and then Dalvik cache from the Advanced Option
Step 4 - Now go back to the recovery menu and select the Install option. Now choose the KitKat 4.4 SlimKat ROM zip file and install it. After that completes, do the same for the Gapps zip file and install it.
Step 5 - After that’s done, go back to the recovery menu and click on Reboot