[Samsung Galaxy S II Plus] samersh72:
:cowboy:

Here is a full guide on how to unroot and back to official stock firmware for Galaxy SII Plus GT-I9105/P. It is useful also if you soft brick your phone​

!!!BE SURE THAT YOU ARE FLASHING THE RIGHT FIRMWARE FOR YOUR VARIANT!!!​

Do it on your own responsibility! if you follow this guide properly u will be on the safe side ;)​

Before we proceed, make sure:

1-You have installed your Samsung Galaxy SII Plus GT-I9105/P USB drivers on your PC (the easiest way is to install Kies).

2-You need to enable USB debugging mode (Settings>Developer options) which is deactivated by default.

3-Your SII Plus GT-I9105/P should have 70-80% charge remaining.

4-Your SII Plus GT-I9105/P should be factory unlocked.

5-Backup your important data like Call logs, SMS and other data stored in phone memory in case if anything goes wrong, your data is not hurt.

6-Make sure that kies program is not running & disable antivirus.

This guide is only for Galaxy SII Plus GT-I9105/P. So don’t bother to try it on other devices.

How to do it:

Step 1) Turn OFF your mobile and go to Download Mode by pressing and holding the Volume Down + Home Buttons together for few seconds followed by Power button then proceed with volume up. (For some phones, when you see the construction Android robot and a triangle, press Power again to confirm to enter into Download Mode).

Step 2) Now open ODIN on your PC and connect your Galaxy SII Plus GT-I9105/P to your computer.

Step 3) Once your phone is successfully connected to your PC, the ID:COM box on ODIN will turn blue and will show the COM port number.

Step 4) unzip the downlowded file, u will get a Home.tar file.

Step 5) click on pda in odin (if odin 3.09 choose AP) and choose the file "xxxx.tar.md5"

Step 6) check "Auto Reboot" and "F. Reset Time" options and make sure that

"Re-Partition" is unchecked

!!!!DO NOT CHECK

"Nand Erase All"

IN ANY WAY!!!!

Step 7) Click on Start button in ODIN window to start the installation process. The process will take few minutes to complete.

DO NOT UNPLUG USB CABLE WHILE EXECUTING THE PROCESS, YOU MAY BRICK YOUR PHONE!

Step 8) When the installation is completed, you read a "Pass". your phone will restart (first boot will take a longer time so don't panic) :good:

It is recommended to make hard reset after flashing to have a fresh official firmware ​

NOTE:

I prefer to perform data and cache wipe before and after flashing stock firmware.

NOTE 1:

If you have a corrupted partition table, (Odin says: "there is no pit partition" or "Re-Partition operation failed"), flash pit file for your device (attached) (put it in pit window) with your firmware, in this case "Re-Partition" must be marked.

NOTE 2:

If it happen, and your new csc doesnt stick (the product code), usually a hard reset can solve this issue, or root it again and use third party application like "csc changer".

NOTE 3:

For warranty reason, and if you have rooted your SII plus, you must reset the binary counter. Some users report that "Triangle away" application works on SII plus, do it when you still rooted and you have stock kernel and recovery.

Odin troubleshooting:

If Odin accidentally gives you "fail" try the following:

- Repeat procedure.

- Make sure that all actions of Kies are disabled from task manager.

- Change usb port.

- Try another usb cable (make sure it is the original).

- Try another Odin version.

- Uninstall and re-install driver.

- Try another computer.

Download Links:​

Odin

For Latest firmwares see second post​

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Don't forget to press THANKS & RATING buttons!