Two firmware versions preventing upgrade to Jelly Bean on Galaxy S2

[mairuzu]

Hi

A long time ago I tried and failed to root my S2 and ended up reverting it back to a copy of the original O2 firmware. To be honest, I didn't really know what I was doing and I think the sheer variety of firmware versions for the S2 out-foxed me.

Anyway, when I try to upgrade to Jelly Bean using Kies it shows that my phone has two firmware versions and will not upgrade to Jelly Bean, giveing me a message in Korean that says (as translated by a Korean friend):

"In case binary file is unregistered, upgrade can't be done.
So check if binary file is registered."

I have tried doing a factory reset on the phone, but it doesn't help.

My phone is on the O2 network in the UK.

Can anyone help me to get it upgraded to Jelly Bean? I know that it's probably a bit of a challenge.

Any help gratefully accepted.

 

[mairuzu]

Sorry, the two firmware versions are:

I9100XWLP3/I9100O2ULP4/
I9100XXLPR/I9100XWLP3

(I believe that the first one is the version that I installed myself)

 

[iTzKPanda]

Try this and see if it works:


Step 1 - Download official Android 4.1.2 XWLSS Jelly Bean firmware for Galaxy S2 on your computer and extract the zip file.

Step 2 - Download ODIN which is needed to install the official firmware on your phone.

Step 3 - Switch off the phone and boot it into Download Mode by pressing and holding Volume Down, Home and Power buttons together, until the construction Android robot icon with a triangle appears on screen. Now hit the Power button again to confirm progress into Download Mode.

Step 4 - Launch ODIN on computer and connect the phone to it while the phone is still in Download Mode.

Step 5 - When the phone connects successfully, one of the ID: COM boxes will indicate yellow with the corresponding COM port number. This process may be time-consuming and could take about five to seven minutes to complete. So, leave it alone.

Step 6 - Choose the files that need to be flashed or installed on the phone, which can be found among the extracted files in Step 1.

Click the 'PDA' checkbox and choose the file named '.tar' or '.md5'.
Tap the'Phone'checkbox and click the file named 'MODEM'. Ignore if such file is missing.
Choose the 'CSC' checkbox and select the file named 'CSC'. Ignore if there is no such file.
Select the 'PIT' checkbox and click the .pit file. Ignore if such file is absent.
Step 7 - In ODIN, enable Auto Reboot and F. Reset Time options by selecting the checkboxes. But, the Re-Partition option must be checked ONLY if a .PIT file is chosen in the previous step.

Step 8 - Hit Start button in ODIN and the firmware installation process will begin. It should take just a few minutes to complete.

Step 9 - Once the official firmware is installed, the phone will automatically reboot. Finally, when the home screen appears, just disconnect the phone from computer.

Samsung Galaxy S2 I9100 is now successfully updated to Android 4.1.2 XWLSS official firmware update. Go to Settings > About Phone to verify the firmware version installed.