Android 4.4 KitKatAndroid 4.4 is the newest OS which should be running on your Galaxy S3 SCH-I535. Our pick for today in terms of firmware used to update your device to that operating system is called KitKat.

Along with KitKat, your Samsung Galaxy S3 will get a taste of an enhanced performance via various tweaks, features, options and so on. The battery life will last more than it did in the past and there won’t be bugs to take away from the enjoyment of your device. If you want to personalize the phone and user experience, the new custom ROM will allow you to do just that.

Prerequisites

Requirements below:

  • root your Galaxy S3;
  • the I535 must have a custom recovery flashed on it;
  • use the model which is factory unlocked;
  • download Gapps and the KitKat custom ROM archive from this page on your laptop;
  • charge the battery of your smartphone;
  • create several backups to preserve your handset’s important data;
  • be sure to synchronize Contacts and People details with your own Google account;
  • charge the phone’s battery unit.

Important instructions

  1. Connect the phone to the laptop with the help of the former’s USB cable, then do this: move the 2 packages from the notebook to the handset’s SD card root. Once the transfer is completed, you should make sure the two devices are no longer connected to one another, then power your Galaxy S3 off.
  2. Boot, next, the handset in Recovery Mode by simultaneously pressing + holding Volume Up, Home and Power. If you haven’t created a NANDroid backup, you should. Do it by checking whether the phone’s running CWM or TWRP.
  3. In case of the latter, make the NANDroid backup by pressing Backup, rename the file that comes up and afterwards confirm. If the CWM is running on the Galaxy S3, you should choose Backup & Restore and then simply make a backup of the restore point on the internal storage of your device.
  4. Up next: apply, on your Galaxy S3, a factory reset. Again, check the custom recovery featured on the smartphone. If it uses the CWM, you have to opt for Factory reset/Wipe data and just confirm. If the TWRP is running instead, you have to do this: press Wipe and swipe in order to confirm.
  5. Now comes the part where you have to install the new firmware. Start by doing the following if TWRP is on your Galaxy S3: tap Install, search for the file and confirm the flashing by swiping a button colored in blue. When the CWM is the custom recovery running on the device, you need to choose Install zip from SD card, choose Choose zip from SD card, find the new Android 4.4 KitKat custom firmware and confirm its installation on your handset.
  6. The Google Apps will be installed on the Galaxy S3 I535 after performing the same tasks used for the flashing of the other file.
  7. When you’re done, go back to your phone’s Recovery screen. From there, reboot, in normal mode, the handset. Launch, next, the Google mail account you use.

Should the new ROM displease you, you should revoke the upgrade by making use of the NANDroid backup file.

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If you are installing the CWM recovery for the first time, check out the video tutorial below:

If you don’t understand something, leave your questions below!

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