Recently, I noticed that Intratech from XDA forums has posted a huge list of stock firmware available for download for the Samsung Galaxy S2 (SII) for the different regions also including the relevant stock kernels and modems if required. Just in case you messed up your Galaxy S2 device or just want to roll-back to the stock firmware for some other reason this is the right place. Here we are going to provide you a simple step-by-step method to flash the stock firmware on your SGS2 device using the Odin. Procedure is actually pretty simple to follow even for the novice users. Only part that needs more attention is the download of the correct firmware (PDA) based on your region that you need to flash on the device. So lets get started!
Note: Rooting, Jailbreaking or customizing your device can be risky, and you may end-up bricking your device! Follow the instructions posted here at your own responsibility as Inspired Geek will not be responsible for any damage to your device.
Please make sure that KIES is not running in the background before following this guide. Also note that you are not required to root/unroot your device to flash the stock firmware.
- Download the ODIN file and then extract the .zip file.
- Download the required PDA file (firmware) from this thread for the Samsung Galaxy S2 device and extract the tar file somewhere by executing the self-extracting exe file.
- If you do not have Samsung’s KIES installed, download and install it. Correct USB drivers must be installed, so that programs can communicate with the device. Reboot computer after KIES installation.
Flash Stock Firmware
Step 1: Make sure that your device is in USB debugging mode: Settings -> Applications -> Development -> USB debugging.
Step 2: Reboot your device into download mode. To do so: Turn the device off, then power it on again by pressing and holding Volume Down + Home + Power simultaneously. You will see a warning asking you to press volume up if you want to continue or volume down to cancel, press volume up to go in download mode.
Step 3: Start ODIN.
Step 4: Connect the device to your computer using USB.
Step 5: Wait a few seconds, the ODIN screen will show that a device is now connected
- Make sure that in ODIN nothing is checked, except the "Auto reboot" and "F. Reset Time"checkboxes.
- Press the "PDA" button, and select the firmware file that you downloaded earlier for your Galaxy S2 device based on the region.
- Press "Start". ODIN will now flash the firmware, and the device should reboot.
Step 6: Done! Now you have reverted back to stock firmware on your Samsung Galaxy SII (S2).
You are done now. Good news is that if you follow the above mentioned procedure correctly it will not wipe your device. However most likely root will be gone. So if you want to re-root the Samsung Galaxy S2 (SII) just follow this step-by-step guide to root the device using insecure kernels.
You might also be interested to have a look at the Samsung Galaxy S II section on our website where we have already covered a large collection of tweaks, tips&tricks and rooting and custom ROM installation guides for the Samsung Galaxy S2 (SII).
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