Samsung Galaxy S3 Update: Manually Install Android V4.3 Jelly Bean UBUGNG1, Set Up This Custom ROM In S3 I9300 Device Via CF-Auto-Root Tool

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Samsung Galaxy S3 Update: IBT reported that Samsung has stopped the software service support to the Galaxy S3 with Exynos chipset due to lack of RAM capacity. Reportedly, users can still get to upgrade their I9300 by installing custom ROM such as Android V4.3 Jelly Bean UBUGNG1 via Chain Fire's CF-Auto-Root.

Pre-requisites before installation:

  • Make sure Samsung Galaxy S3 GT-I9300 is running on the official update Android v4.3 Jelly Bean (UBUGNG1)
  • Rooting of devices sometimes (if procedure is not followed properly) leads to complete data wipe out, so make sure to back all the data. [Install Clockwork Mod (CWM) Recovery/ TWRP in the smartphone to save the data].
  • Users make sure they have installed USB drivers on the PC, or else your phone (Samsung Galaxy S3 GT-I9300) will not be recognized by the computer.
  • Make sure your device has more than 80 percent battery, or else there is chance of smartphone getting temporarily bricked if the rooting process is interrupted in the mid-way.
  • Though rooting of smartphone enables more control to users over the smartphone, the company warranty will stand void and will no longer be liable for future updates [warranty can be restored by flashing the device with stock-ROM]

Note: This ROM updates are not coming from Samsung and have nothing to do with the already mentioned company. This report is only made to inform users of possible updates and this site is not liable for any damages that these installations may cause.

Step-by-step installation procedure of rooting for Samsung Galaxy S3 GT-I9300:

Step 1: Download Android rooting package (CF-Auto-Root) for Samsung Galaxy S3 GT-I9300 in to the PC and extract the file.

Step 2: Download Odin v3.09 (here) [This will help in step-by-step procedure of rooting the phone]

Step 3: Now, turn-off of the phone, then enter download mode, by press holding Volume (down) + Home button+ Power button, once you see an animated Android Bot, press Power key (again) to enter to download mode.

[Note: Before plugging the phone to the computer, be sure you have installed USB driver software, if not, click here to download firmware]

Step 4: Now, open ODIN file on your PC, and then connect the smartphone (under download mode) to the PC.

[Note: If the connection between smartphone and PC is successfully established, then one of the ID: COM turns to yellow color and it will display the COM port number as well]

Step 5: Then, choose the file to be installed, in this case, select 'PDA'/'AP' and click the file - 'CF-Auto-Root-m0-m0xx-gti9300.tar.md5'

Step 6: Inside Odin, don't forget to check options- Auto Reboot and F.Reset Time

Step 7: Now, initiate the rooting process by tapping the 'Start' button in ODIN.

Step 8: Once the installation is completed, the phone will re-boot automatically in Recovery Mode to place the root package in the smartphone [hint: ID:COM turns green if everything done in the procedure is going in the right way]

Step 9: Once you see the home screen on the Samsung Galaxy S3, disconnect the phone from the PC.

According to IBT, the device will take a minimum of five minutes to complete the booting process.

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