Samsung just announced official Ice Cream Sandwich update for the owners of Galaxy S2 for South Korea, Poland and some other regions. Now the official firmware XXLPQ has been pulled for Galaxy S2, and here’s instructions to install the official LPQ ICS firmware on Galaxy S2, don’t worry this will not void warranty of your device but the below guide will wipe the data of device, it means you should make a backup of your device data.
If you’re interested please note that below guide may not work on all Galaxy S2 variants, Samsung mentioned just Galaxy S2 but not mentioned of US variants. Galaxy S2 LTE devices are not supported. To install this update latest Samsung Kies must be installed on your PC, it contains all of the required USB drivers. Please turn the USB debugging on, just go to ‘Settings >> Applications >> Development‘ and check the relevant box.
DISCLAIMER: The below method is bit risky and we will not be held responsible if you lose data or your device gets damaged in the following of this guide so please proceed at your own risk.
Step #2: Download ODIN.
Step #3: Extract the downloaded XXLPQ firmware zip file into a folder.
Step #4: Turn the device off and re-insert its battery, now boot your Galaxy S2 in Download mode by pressing the Volume Down + Home + Power button simultaneously. Your phone will then show you a warning. Simply skip the warning by pressing the Volume Up button.
Step #5: Now open ODIN, and then connect your Galaxy S II to your PC. ODIN will then detect your phone, and display a random COM:IDnumber inside a glowing rectangle box. Click on the ‘PDA’ button, and select the ‘I9100XXLPQ_I9100OXALPQ_I9100XXLPQ_HOME.tar.md5’ file. It is the only file inside the zip file that you downloaded in Step 1 above.
Step #6: Don’t touch any other option just hit the Start button and wait for ODIN to flash the firmware. Odin will take time, so please wait. The first boot after the flash will also take considerable time. It took nearly 10minutes for my Galaxy S II to start after I flashed the firmware.
Update: Added some mirrors for the firmware download link. For root access, download and flash Siyah Kernel LPQ and flash via ODIN.
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