[How To] Update Galaxy S2 GT-I9100 to Android 4.4 KitKat with Biftor SlimKat ROM

Known Bugs/Issues:

[As of December 25, 2013]

• No issues reported it.

Let’s see how to install the Android 4.4 KitKat on your Samsung Galaxy S2 GT-I9100.

WARNING!

Warranty may be void of your device if you follow the procedures given on this page.

You only are responsible for your device. We won’t be liable if any damage occurs to your device and/or its components.

CHECK DEVICE MODEL NO.

To make sure your device is eligible with this, you must first confirm its model no. in ‘About device’ option under Settings. Another way to confirm model no. is by looking for it on the packaging box of your device. It must be GT-I9100!

Do not use the procedures discussed here on any other variants, like the S2 sets at T-Mobile, Verizon, Sprint, etc. You have been warned!

BEFORE YOU BEGIN..

You must do this pre-installation stuff before attempting to install the ROM on your Samsung Galaxy S2 GT-I9100 in order to avoid any complications later, and have a smooth and successful process.

BACK UP YOUR DEVICE

Back up important data and stuff before you start playing around here as there are chances you might lose your apps and app-data (app settings, game progress, etc.), and in rare case, files on the internal memory, too.

For help on Backup and Restore, check out our exclusive page on that linked right below.

► ANDROID BACK UP AND RESTORE GUIDE: APPS AND TIPS

CHARGE YOUR DEVICE

If your android device powers off due to lack of battery while the process is underway, it could damage the device.

So, make sure your device is adequately charged — at least 50% battery of the device.

EXAMPLE VIDEO

If you haven’t used a custom recovery, either CWM or TWRP, before, to install a .zip file of a ROM on anything else, then we suggest you first watch a video of that, given right below, to get familiar with the process.

Just fyi, the video below shows installing a .zip file (of recovery) on Galaxy S3, but it doesn’t matter as the process remains exactly same. So, once you are finished with video, jump to downloads and step-by-step guide below.

SAMSUNG GALAXY S2 GT-I9100  ANDROID 4.4 KITKAT UPDATE

DOWNLOADS

Download the files given below and transfer them to a separate folder on your phone and remember the location.

ROM FILE

DOWNLOAD LINK | MIRROR | File name: Biftor™ SlimKat-Rom-V1.0-i9100-4.4.2-20131223.zip (132 MB)

For latest version of the ROM, check the original page here →

SCRIPT FILE

DOWNLOAD LINK | File name: SuperWipe_By_Biftor.zip (143.08 KB)

Before you proceed, make sure you’ve transferred the files you downloaded above to a separate folder on your Samsung Galaxy S2 GT-I9100.

STEP-BY-STEP GUIDE

Reminder: Make sure you’ve installed latest version of the recovery of your choice and have backed up your device adequately (including important data stored on internal memory) as mentioned in ‘Before you begin‘ section above.

GUIDE FOR CWM RECOVERY USERS

1. Boot into recovery mode. For this:
   • Power off your device and wait for 5-10 seconds until the device is fully switched off
   • Press and hold  Volume Up + Home + Power buttons together and release them as soon as you see the Galaxy S2 logo
     └ In Recovery mode, use Volume buttons to navigate Up and Down between options and use Power button to select an option.
     (For help, check out our Galaxy S 2 Recovery Mode page).
2. Create a Nandroid Backup from recovery. It’s optional but very important to do, so that in case something goes wrong you can restore to current status easily. For making a Nandroid Backup, go to Backup And Restore » Backup.
3. Perform a Factory Reset (This will delete all apps and their settings and game progress). For this:
   • Select Wipe data/Factory reset, then select Yes on the next screen to confirm factory reset (screenshot).
   • Select Wipe Cache Partition, then select Yes on the next screen to confirm wiping cache.
4. Now, format the system. Go to mounts and storage and select format/system, and then select Yes on next screen.
5. First Install the script file:
   • Select Install zip » Choose zip from sdcard (or external sdcard, you know where your files are) » browse to the location where you saved the file and select the Script file.
6. Next wipe dalvik cache as well as the battery status in the Advanced menu.
7. Now Install the ROM file:
   • Select Install zip » Choose zip from sdcard (or external sdcard, you know where your files are) » browse to the location where you saved the file and select the ROM file.
     
8. Reboot your device. For this, go back to the main menu of recovery and select reboot system now.

That’s all. Your phone will now reboot and it will take some time as it’ll be phone’s first boot after installing Android 4.4, be patient and excited for this!

Note: In case your device gets bootloop (stuck at logo while rebooting), just do a factory reset (step 3) and you will be fine.

GUIDE FOR TWRP RECOVERY USERS

1. Boot into recovery mode. For this:
   • Power off your device and wait for 5-10 seconds until the device is fully switched off
   • Press and hold  Volume Up + Home + Power buttons together and release them as soon as you see the Galaxy S2  logo.
     For help, check out our Galaxy S 2 Recovery Mode page.
2. Create a Nandroid Backup from recovery. It’s optional but very important to do, so that in case something goes wrong you can restore to current status easily. For making a Nandroid Backup, go to Backup » and select all check boxes and swipe on the Swipe to confirm option at the bottom of the screen to confirm backup.
   
3. Perform a Factory Reset (this will delete all apps and their settings and game progress). For this:
   • Tap on Wipe » then at the bottom of the screen do a Swipe on the ‘Swipe to factory reset‘ option (screenshot)
4. First Install the Script file:
   • Tap on Install » browse to the location where you saved the files and tap on the Script file. Now at the bottom of the screen, do a swipe on the Swipe to confirm flash option to begin flashing.
5. First Install the ROM file:
   • Tap on Install » browse to the location where you saved the files and tap on the ROM file. Now at the bottom of the screen, do a swipe on the Swipe to confirm flash option to begin flashing.
     
6. Reboot your device. Go back to the main menu of recovery and tap on Reboot » then, tap on System to reboot your phone.

That’s all. Your phone will now reboot and it will take some time as it’ll be phone’s first boot after installing Android 4.4, be patient and excited for this!

Note: In case your device gets bootloop (stuck at logo while rebooting), just do a factory reset (step 3) and you will be fine.

SCREENSHOTS

FEEDBACK US!

It was easy to install Android 4.4 KitKat, right? Let us know how it tastes to you.

Your suggestions and queries, if any, are most welcomed!