Samsung recently rolled out its latest official Jelly Bean Over-The-Air (OTA) update, Android 4.1.2 XXEMF6, for Galaxy S3 I9300 in several countries including the Philippines, Italy, Switzerland, Algeria, Germany, Norway and Spain. The firmware is also available for download via Samsung KIES in select countries.
Galaxy S3 users, who have already installed the latest official firmware, can now root the same via CF-Auto-Root tool by XDA Recognised Developer, Chainfire, using our step-by-step guide below.
NOTE: Rooting the device essential to install third-party root apps, system tweaks and gain full system access for installing custom firmware voids its warranty. However, warranty can be reclaimed by reinstalling the latest official firmware for the device.
Key Points to Note
- The CF-Auto-Root tool and these instructions are meant for the Galaxy S3 GT-I9300 model only. Do not attempt installing this root on another variant or device, as it may inadvertently hard-brick or damage the device. Verify the device model number by navigating to Settings > About Phone.
- Back up data and settings via a recommended custom recovery tool such as ClockworkMod (CWM) or TWRP
- Verify appropriate USB driversare installed for the device on computer (download Galaxy S3 I9300 USB drivers)
- Ensure USB debugging mode is enabled on phone by navigating to Settings > Developer Options (if device is running Android 4.0 or later) or Settings > Applications > Development (if device is running Android 2.3 or earlier). If device is running Android 4.2, perform the following steps:
- Go to Settings > About Tablet
- Scroll to bottom of screen and select Build Number
- Tap device's Build Number seven times to unlock or reveal hidden developer options under Settings. Then select checkbox to enable USB debugging mode under Settings > Developer Options.
- Ensure phone has at least 80% battery charge to prevent unexpected device shutdown (due to battery drain) while installing ROM.
- Ensure both device and its bootloader isunlocked.
- Make sure that the phone is already running on latest Android 4.1.2 XXEMF6 Jelly Bean official firmware before you proceed.
- If device is stuck at booting or experiences boot loop issues,Wipe Cache Partition and Wipe Dalvik Cache a few more times before rebooting.
- Instructions provided in this guide are meant for reference purpose only. IBTimes UK reminds readers it will not be held liable if device is damaged or bricked during or after firmware installation. Users are advised to proceed at their own risk.
How to Root Galaxy S3 I9300 on Official Android 4.1.2 XXEMF6 Jelly Bean Firmware
Step 1: Extract CF-Auto-Root and Odin 3.07 files via winrar, 7zip or winzip to your computer desktop.
Step 2: Power off the Galaxy S3 and boot it into Download Mode by pressing and holding Volume Down, Home and Power buttons together until a construction Android robot icon with a warning triangle appears on screen. Now hit Volume Up button to enter Download Mode.
Step 3: Launch Odin on computer as Administrator.
Step 4: Connect the phone to computer via USB cable while it is still in Download Mode. Wait until Odin detects the device and ID: COM box turns blue with the corresponding COM port number.
Note: If the Added message fails to appear after ID: COM box turns blue, try re-installing USB drivers for phone or changing the USB port on computer.
Step 5: In Odin, click PDA button and choose CF-Auto-Root-m0-m0xx-gti9300.tar.md5 file.
Step 6: Ensure Auto Reboot and F. Reset Time checkboxes are chosen in Odin. But, the Re-Partition option must be unchecked.
Step 7: Verify steps 5 and 6, and then click Start in Odin. The root installation process should begin.
Step 8: After the root installation process completes, your phone will reboot and soon a PASS message with green background appears at the top of Odin in the left-most box. Now disconnect the USB cable to remove device from computer.
Samsung Galaxy S3 GT-I9300 running on Android 4.1.2 XXEMF6 Jelly Bean official firmware is now rooted successfully. It is now possible to install any app requiring root permission. Verify the root status of the device by installing Root Checker app from Google Play Store.
[Source: Honai of Android]