My Solution

Samsung has now launched Android 4.3 Jelly Bean is UBUGMK6 official firmware update for the Galaxy S3 GT-I9300. Updates the firmware was launched in various countries including Brazil one of them, and also can be downloaded for a manual update. This new firmware update just brings bug fixes and performance tweaks on the Galaxy S3 GT-I9300 you. Well right Keep reading this guide to learn further how to get an official stock Android 4.3 Jelly Bean I9300UBUGMK6 firmware running on the Galaxy S3 GT-I9300. Almost all possible ways in this alloy to update your device to this firmware discussed here. One thing to note that the official firmware flashing or installing the recovery kernel root access you will fail, in short it will unroot.

I9300UBUGMK6 Android 4.3 Jelly Bean firmware stok tersedia di kedua OTA dan Kies mengupdate. Namun, jika Anda tidak bisa mendapatkannya dari sana maka Anda bisa selalu menyala I9300UBUGMK6 Android 4.3 Jelly Bean firmware pada Galaxy S3 GT-I9300 manual. Kami akan membicarakan semua metode pembaruan yang tersedia. Anda harus selalu mencoba OTA atau metode Kies pertama dan ketika kedua metode tidak bekerja maka hanya mencoba flashing manual.

Pre Requisites:

Though official firmware restore all existing data but we recommend to back up your data first before proceeding to avoid any uncomfortable situation such as bootloop fix.

1. Backup your device data.

2. Make sure your device have at least 60% battery power. You can install an app like Battery Notifier BT Free on your Android device to check it easily.

3. You already have USB Driver Installed for Galaxy S3 GT-I9300 in your PC. Download USB Drivers

4. Make sure USB Debugging is enabled otherwise you won’t able to transfer file between PC and Galaxy 

1. First of all make sure you have stable internet connection (Wi-Fi or data network) on your device.
2. Now, go to Android app drawer and then select Settings.
3. Then locate About Device and tap on it.
4. Next select Software update from About device screen.
5. Then tap on Update option.
6. You should see an update, press OK to download and install. (Remember, download using 3G or network data will incur additional charges to your phone bill!)
7. Soon your device will reboot to complete the installation process.

If you see “The latest update have already been installed” massage while checking update then your device yet to receive an OTA update. Check back within few days or jump to next procedure.

Again! If you see “This is the latest firmware” in Samsung Kies, then your device yet to receive the latest update on Kies. Its good time to go for manual update instruction that located below.

I9300UBUGMK6 Android 4.3 Jelly Bean Firmware Details:

PDA: I9300UBUGMK6
CSC: I9300ZTOUGMK3

Download: I9300UBUGMK6 I9300ZTOUGMK3_ZTO.zip

Please Note: After flashing this firmware you will lost any installed custom ROM including CM10.2, AOKP, Avatar,Beanstalk, Omni ROM, Slim ROM, Pac-Man, Paranoid Android, LiquidSmooth or Carbon.

1. Download Odin v3.09.
2. Extract Firmware zip file that you downloaded earlier from above link, you will get a .tar.md5 file and some other files (optional).
3. Extract Odin zip file and you will get Odin3 v3.09.exe along with few other files.
4. Power off your Android device. Wait 5-6 seconds for vibration to confirm complete switch off.
5. Now, put the Galaxy S3 GT-I9300 in Download Mode by pressing and holding down the Home & Volume Down button together while pressing the Power button. A warning screen will come up; press Volume Up button to enter Download Mode.
6. Now run Odin3 v3.09.exe (see Step 3) as an Administrator because Admin privileges is required to complete the process smoothly (only applicable Windows Vista and higher).
7. Now connect your device to your PC using USB cable. An “Added!!” massage will appear in Odin’s message box. If you don’t get the same then you should try another USB port (try USB port located in back in your desktop PC). If that too don’t work then you should reinstall the driver. If you successfully see the “Added!!” message in Odin then you are ready to go in next step. You should also see COM port with a number in Yellow if you successfully added your device.
8. Click the AP Button, and select that .tar.md5 file that you get in Step 2.
9. In Odin window, make sure only Auto Reboot and F. Reset Time checkboxes are selected.
10. Double check everything that we mentioned in Step 8 & Step 9 above. Now, once satisfied hit the START button to begin the flashing process.
11. Once flashing completed, your Galaxy S3 GT-I9300 will restart and soon you will see a PASS message with green background in the left-most box at the very top of the Odin. You can now unplug the USB cable to disconnect your device from computer.

Congrats! You just updated your Galaxy S3 GT-I9300 to Android 4.3 Jelly Bean firmware. Go to Settings > About device to verify this firmware update.

If Galaxy S3 GT-I9300 stuck at booting animation for more than 10 minutes after Step 11 then follow below instructions:

• Go to recovery mode. To do so, press and hold the Volume Up, Home and Power buttons together.
• Now perform Wipe data/Factory Reset and Wipe Cache Partition task before selecting reboot system now function. In recovery mode use Volume keys to navigate between options and Power key to select the option.

Please note, performing wiping task will erase your device internal memory data and not external SD card data.
That’s it! Let us know about your latest Android 4.3 Jelly Bean experience.  visit and get more info ....