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Want to root your S2 without losing any data/configuration? Then you're in the right place. This guide is a compilation of bits of information I found scattered about the interwebs, as well as instructions/files by JTuck, droidroidz, and the development community, so thanks/credit to them. I'm not going to skip any of the details that anyone with any experience would find blatantly obvious, so if you have almost no clue what you're doing, you might still be able to follow this pretty well. Before you follow this guide, make sure: You have a US Cellular Galaxy S2 (SCH-R760) with the latest updated stock ICS (Android 4.0.4 Build# FL26). Settings>About Device to check that.The phone's It's decently chargedYou've got your drivers installed (Odin won't detect your phone without them; if your phone's not being detected, try installing Samsung Kies)You understand nothing bad should happen, but in the off chance it does, I'm not responsible for your phoneUSB Debugging is enabled on your phone (Settings>Developer Options)Your phone is off and unplugged from your computer.You have read through the instructions before beginning, and are capable of completing them all.If you're good to go, then lets begin: Download and unpack S2 Root.zip (attached to this post) In the extracted folder, open the Odin folder, then run the Odin3 application. Under the "Files [Download]" section, click "PDA". Navigate to the S2Root extracted folder, and select the SCH-R760 tar.md5 file. This is the stock kernel, except with ClockWork Mod installed, which we will use in a minute. Check that the PDA check-box is now ticked, and the correct file is selected. Hold the volume down and power button on your phone (which should be off) simultaneously to boot into ODIN mode. A warning will appear. Press the volume up button to proceed. Plug your phone into your computer with the standard cable. Wait for your computer to finish detecting your phone. The Odin3 application on your computer should say "Added!" in the message box to indicate your phone is detected. If it does not, check your drivers. Be sure that under the options pane, only "Auto Reboot" and "F. Reset Time" (the defaults) are checked. Click "Start" in the Odin3 application. Wait while the new kernel is installed. Wait for your phone to completely reboot into its normal OS. A yellow triangle will appear during the boot process. This is normal. The Odin3 application should display the message "Leaving CS" to indicate the process is done. You may now exit the Odin3 application. Your phone should now be on, with the updated kernel, but operating as if nothing had happened. Open up your phone's directory on your computer, and drag the file update.zip (from the S2Root extracted folder) into the root of your phone's SD card. Be sure to put it on the native SD, and not an external if you have one. This is usually called "Phone" (vs "Card" for the external) in your phone's storage directory. Once you have both files in the root directory of the SD card, safely unplug your phone, then power it off. With your phone off, hold the power button and the volume UP button together until you see the first logo. The will boot your phone into CW Recovery (which we just installed a few steps ago). In Recovery, you navigate with the up/down volume keys; the power button is enter. Knowing that, select "install zip from sdcard". Select the second option, "apply /sdcard/update.zip". If that's not available, you put the file in the wrong place. Either move it with your computer, or find where you put it via "choose zip from sdcard". Select "yes" from the next menu and wait for SuperSU (which is what is in update.zip) to finish installing. Go back to the main screen, and choose reboot system now. A menu should pop up warning you that the phone might revert to stock kernel. Do as it suggests, and disable this reversion. Your phone will reboot, and you now have root! Install Titanium Backup to back up your phone and remove bloatware if you want.Things to note: The yellow triangle on boot will persist. You can try triangle away, but I didn't have any luck with it on this kernel. Don't follow this guide if you can't deal with it.Rooting using this method will not delete any apps/contacts/data/configurations etc. It only affects the kernel, and adds SuperSU.Flashing a custom ROM (not done in this tutorial) does delete data.You might want to try some of the one-click methods first (google one-click root or easy root, etc), but none of them worked for me.Despite what your system might say, you're now on an FK19 kernel. That means you're vulnerable to the security exploit present in that build. Consider patching it.Questions? You're probably better asking one of the long-timers, but I'll try to help out where I can. S2 Root.zip
I have a Samsung Galaxy S2 R760 for alltel. I installed CM9 then flashed CM10 and ran into a few issues and for some reason my backup copy got erased. So I downloaded the stock odin files for the usc galaxy s2 flashed them over and now I have absolutely no data. I tried flashing other roms to see if I just lost a file I needed but so far no luck. My job requires driving so I need my gps. If you can help me please do so!
Hey guys...new to the forums. Need some help with this rooting situation. I have a Samsung Galaxy S2 under Carolina West Wireless contract. was wondering if there was any info on here on how to root it to install new Jelly Bean ROM and maybe a new kernel. Can't seem to find any information on my specific carrier's model. Any help and info would be greatly appreciated. Here's my "About Phone" information.