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Discussion Starter · #1 ·
I've being tryied to root my Galaxy Tab 2 7" for a long time, trying different ways to do it, but with no good results.
Yesterday I foung in a different Forun a Simple way to root my device. In fact, I actually did it today in very simple steps.

Thanks and all the credits to Chainfire (if you feel so, help him with a beer!)

I will just copy the topic right down:

[GT-P31xx] CF-Auto-Root

Check your device model ! Settings -> About device -> Model number. See the third post for exact supported model numbers. If your device is a totally different model, it will not work (may even brick) !

CF-Root is the root for "rooting beginners" and those who want to keep as close to stock as possible. CF-Root is meant to be used in combination with stock Samsung firmwares, and be the quickest and easiest way for your first root.

CF-Root has been available for many devices and has clocked over 8 million downloads. This is not even counting custom ROMs that already include it. Don't be a leech, buy me a beer (and use the "Thanks" button!). Imagine if every CF-Root user has donated me $1...

What's installed
- SuperSU binary and APK
- Stock recovery

Installation and usage
Flash the CF-Auto-Root package as PDA in ODIN (details on how to do that are in next post), and your device should reboot into a modified recovery (signified by a large red Android logo) and it will install SuperSU for you and restore the stock recovery, and reboot back into Android.

If you don't get to the red Android logo, boot into recovery manually ("adb reboot recovery", or boot while holding Power+VolUp+Home).

Using this root increases your flash counter. You should run Triangle Away (see below) after rooting to reset the counter. Note that if you want to run custom kernels or custom recoveries, your flash counter will be set to 1 at every boot. Either configure Triangle Away to reset the counter at every boot (Play version only) or only reset the counter when you need to go into warranty.

Did you see the red Android logo during rooting, but SuperSU does not appear? This may sometimes occur due to left-over files and settings, however, you can usually install SuperSU from Google Play at this stage and it'll just work.

Not included - Triangle Away
Triangle Away can be used to reset the flash counter after installing CF-Root. The flash counter keeps track of how many custom firmwares you have flashed, as this voids warranty. (No idea what this about ? Read up on it, you will want to use this !)

Not included - adbd Insecure
As this CF-Root does not include a custom kernel, adb shell does not have root access by default (you can still get it by typing su inside the shell), nor is adb remount supported, nor will adb push and adb pull work on system files. adbd Insecure can be used to remedy this situation. (No idea what this is about ? Don't worry about it !)

CF-Auto-Root homepage

CF-Auto-Root main thread
[CENTRAL] CF-Auto-Root
For requests for new roots and generic discussion - please keep device specific discussion in the thread you are viewing now.

ODIN Installation (detailed)
- Follow these instructions to the letter. Do not touch any buttons or checkboxes that are not listed below to touch!
- Unzip the attached file
- Download and unzip the file (see posts below this one)
- If you end up with a recovery.img and cache.img file, you've extracted twice. You need to end up with a .tar.md5 file - don't extract that one
- (USB) Disconnect your phone from your computer
- Start Odin3-vX.X.exe
- Click the PDA button, and select CF-Auto-Root-....tar.md5
- Put your phone in download mode (turn off phone, then hold VolDown+Power to boot - if it asks you to press a button to continue, press the listed button, or run adb reboot download command)
- (USB) Connect the phone to your computer
- Make sure Repartition is NOT checked
- Click the Start button
- Wait for Android to boot
- Done (if it took you more than 30 seconds, you need practise!)

- NOTE: Sometimes the device does *not* boot into recovery mode and root your device. Just do the entire procedure again if this happens. If it still will not install root and such, make sure that in Odin "Auto Reboot" is not checked. Then after flashing, hold VolUp+Power (for several seconds) to boot into recovery manually. This will start the install process.

New to Samsung? Unfamiliar with Odin? Think all the above is a hassle? Get used to it. It's very simple, and us Samsung folk use Odin (or Mobile ODIN ) for everything! It's so very very convenient once you get used to it. Notice the 30 second comment above? For experienced users, the entire process indeed takes only 30 seconds!

You may now optionally want to install and run Triangle Away to reset the flash counter.


2012.12.04 --- CF-Auto-Root

SuperSU: v0.99





--- History ---
2012.12.02: SuperSU v0.98
2012.10.26: SuperSU v0.96


[ROOT] TriangleAway v2.60
Many Samsung devices store a flash counter that keeps track of how many times you have flashed custom firmwares to your device. On some devices, a yellow triangle or other sort of visual warning is also displayed during boot if you are running a custom firmware. TriangleAway was built to disable the triangle (if a visual warning is present) and reset the custom ROM flash counter to 0. This app requires root !

You can find out the current status of your flash counter and firmware state (custom or official) by booting into "download mode" on most devices. The usual way of getting into "download mode" is by first turning off your device, then turning it on by pressing and holding VolDown+(Home)+Power. Alternatively, the "adb reboot download" command also often works.

When you run TriangleAway, if your device and firmware are supported, it will show you the detected state of the binary (custom or official) and flash counter value, and the option to Reset flash counter. Please confirm that the information shown is correct before resetting the values.

On a number of devices, TriangleAway can work, but your firmware may not be supported directly. In that case, the app will tell you it needs to reboot into a special boot mode, which will be happen if you select Reset flash counter. The device will reboot into a special mode which will allow you to review the current status and reset the binary and flash counter values (or abort and do nothing). On some devices this will actually trigger the counter to 1 if its 0 - so if you're "just checking", do that in download mode!

( and by brick I mean brick - only a board replacement or a JTAG unit will be able to save you, don't mess with boot(loader) stuff unless you really mean it! )

Note#1: using Triangle Away may unmount your SD card. Reboot or manually remount it from Android settings.

Note#2: on new devices like the SGS3/SGNote2/SGNote10.1, the "system modified" status can only be reset on some firmwares - they must be stock firmwares!


- Triangle Away shows a negative counter ?
If you have a very large flash count (over 127) this is known to happen. Please confirm in download mode that you actually have that large a flash count before resetting the counter.

- After using Triangle Away I get no bootscreen at all or an error message on screen ?
Try flashing the attached "param.tar" as PDA in ODIN (no repartition!), that may clear up the issue. Samsung Galaxy S II GT-I9100 ONLY

- What about future updates and devices ?
Please read this article I wrote about this:

- On my SGS3/Note2/etc, Download Mode says my System is modified, and Triangle Away does not reset it
Triangle Away attempt to reset this status and block it from coming back, but it depends on the firmware. It does work on some (not all) stock firmwares. Resetting this value doesn't work on custom firmwares! See the post below this one for more information.

- On the SGS3/Note2/etc, System->Settings->About device->Status still shows "Modified"
This is outside the scope of Triangle Away. The "system" status is not even always resettable in the bootloader. If you are going for warranty, you need to also reflash a full stock firmware and wipe your device. If they boot up your device and find root apps, you're not going to get any warranty anyway. If you do such a full stock reflash and wipe, the "Modified" value will go away. See the post below this one for more information.

- My counter always stays at 1
Some devices/bootloaders set the counter to 1 at every boot if you are running a custom kernel or recovery. On these devices, Triangle Away may always display 1 - make sure to check the counter in actual download mode, and make sure you are running a stock Samsung kernel and recovery.

Supported devices

Samsung Galaxy S2 GT-I9100 **
Samsung Galaxy S2 SPH-D710 Epic 4G Touch **
Samsung Galaxy Note GT-N7000 **
Samsung Galaxy Note GT-I9220 **
Samsung Galaxy S3 GT-I9300 **
Samsung Galaxy S3 GT-I9300T **
Samsung Galaxy S3 AT&T
Samsung Galaxy S3 Sprint
Samsung Galaxy S3 T-Mobile
Samsung Galaxy S3 Verizon
Samsung Galaxy S3 Canada
Samsung Galaxy S3 US Cellular
Samsung Galaxy S3 GT-I9305 LTE **
Samsung Galaxy S3 GT-I9305T LTE **
Samsung Galaxy S3 GT-I9305N LTE **
Samsung Galaxy S3 Korea SHV-E210K/L/S ** DISABLE DUE TO ISSUES
Samsung Galaxy S3 Korea SHW-M440S **
Samsung Galaxy Note 2 GT-N7100/T **
Samsung Galaxy Note 2 GT-N7102 **
Samsung Galaxy Note 2 GT-N7105/T LTE **
Samsung Galaxy Note 2 SPH-L900 Sprint **
Samsung Galaxy Note 2 SGH-T889 T-Mobile **
Samsung Galaxy Note 2 SGH-T889V Canada **
Samsung Galaxy Note 2 SGH-R950 US Cellular **
Samsung Galaxy Note 2 AT&T/Canada SGH-I317/M **
Samsung Galaxy Note 2 SCH-I605 Verizon ** UNLOCKED BOOTLOADER ONLY
Samsung Galaxy Note 2 Korea SHV-E250K/L/S **
Samsung Galaxy Camera EK-GC100 **
Samsung Galaxy Note 10.1" GT-N8000 3G **
Samsung Galaxy Note 10.1" GT-N801x Wi-Fi **
Samsung Galaxy Note 10.1" GT-N8020 LTE **
Samsung Galaxy Note 10.1" SHW-M480S/K/W **
Samsung Galaxy Tab 2 GT-P310x 7" 3G
Samsung Galaxy Tab 2 GT-P311x 7" Wi-Fi
Samsung Galaxy Tab 2 GT-P510x 10.1" 3G
Samsung Galaxy Tab 2 GT-P511x 10.1" Wi-Fi

Various Qualcomm-based Samsung devices should now be supported as well, but I don't know which ones - please let me know!
Suspected is a large range of Qualcomm based Note and S2 variants.

** Various related models are supported depending on firmware, but only the exact model numbers listed are supported regardless of firmware version.

Whether or not Triangle Away works depends largely on your kernel. Flashing a different kernel may make it work if it previously didn't.


Download from Google Play

The Google Play download is not free - it costs about a beer (thanks!). The download listed below is 100% the exact same program, but free. I provide it for free because I believe this app should be available even to people who cannot pay on Google Play. If you are able to purchase on Play, please consider that I have spent a great many hours on this, and the latest version also uses server resources I have to pay for.


( 1.00: 634; 1.10: 12795; 1.25: 59699; 1.50: 2891; 1.51: 45740; 1.70: 30839; 1.
: 13997; 1.90: 26020; 2.00: 10141; 2.05: 2421; 2.06: 755; 2.10: 17703; 2.15: 4780; 2.20: 4219; 2.25: 2861; 2.26: 11340; 2.30: 5132; 2.35: 676; 2.36: 16139; 2.37: 77595; 2.40: 12019; 2.45: 2725; 2.50: 7233; 2.55: 19784 )
param.tar - [Click for QR Code] (1.06 MB, 76651 views)
TriangleAway-v2.60.apk - [Click for QR Code] (264.7 KB, 20445 views)
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