Samsung Galaxy S2 GT-I9100 Firmware Downloads

This is the firmware archive of the international variants of the Samsung Galaxy S2. The device was originally runs in Android 2.3 Gingerbread firmware when launched. Yet it has received its last firmware update to Android 4.1.2 Jellybean in 2014. So the rest is part of the history.

Anyways, just in-case you might need the firmware for the device, just simply grab the firmware version from the table below. However, if you couldn’t find of what you are looking for, you can still use other countries firmware build version.

Samsung Galaxy S2 GT-I9100 Android 4.1.2 Jellybean Firmware

Build version Firmware Release date
I9100XWMS2 2013 December
I9100XXMS7 2013 April
I9100XWLSW 2013 May
I9100XWLSS 2013 May
I9100XWLSH 2013 April
I9100XWLSD  2013 February
I9100DXLSD 2013 January
I9100XXMS1 2013 May
 I9100UHMS8 2013 January

Samsung Galaxy S2 GT-I9100 Android 4.0 Ice Cream Sandwich Firmware

The Android 4.0.3 to Android 4.0.4 Ice Cream Sandwich firmware were no longer suitable nor applicable for the device. Newer updates such as the Android 4.1.2 Jellybean includes several bug-fixes and system enhancements. So it just makes sense that we may only install the much stable firmware for the device.

You may check the firmware history of the Android 4.0 ICS at this page: Samsung Galaxy S2 Firmware Updates

How to Install Samsung Galaxy S2 GT-I9100 Firmware

This process can only be done such as the following:
To unroot a Samsung Galaxy S2 GT-I9100, as well as to restore it back to stock. Likewise for fixing soft-bricks and manually upgrade to the latest firmware if the device has been modified or rooted. If you do know what this is all about then refrain from doing so.

Important Note: DO NOT ever try to downgrade or revert back to an older firmware version on top of the newer firmware updates. It will no longer work and it’ll just won’t let you install back the said firmware package.


Before you proceed prepare these necessary things as follows so you’ll not messed-up your phone:

Recharge the device battery – Make sure that your Samsung Galaxy S2 GT-I9100 battery is fully recharged to ensure its stability. A power failure during the installation process may harm your device.• Prepare a PC as this process will not tend to work in Mac computers.

Enable USB debugging mode if you are having issues connecting your device to the computer try to enable this option. Go to Settings > About device > Developer option > USB debugging.

Backup all your personal data – Use “Samsung Kies (Google it) to easily make a backup of your Contacts, Messages, Applications, Pictures, and Videos, so that you will not lose it. You must do this because the recent firmware packages will wipe out your device stored data.

Grab these tools

  • Odin3_v3.10 downloader or use the latest version.
  • USB Driver – only needed if you haven’t installed the latest Samsung Smart Switch in your PC.

Extract/Unzip the download stock firmware

Extract the downloaded firmware. Use any decompressing program you have had in your computer.

Reboot the phone into Download mode

Reboot your Samsung Galaxy S2 GT-I9100 into Download Mode: Turn it Off first. Now, Press and hold the Volume Down, HOME and Power ON button at the same time. You will then presented into a “Warning Message” screen, just press the Volume Up to continue. Once the Android robot and a “Downloading” message appears. If you can’t get into it, repeat the 3-button combination again and again.

Run and Configure Odin3 Flasher

Run Odin3 flasher program. In Odin window DO NOT tick the option box that says ‘Re-Partition’. Leave the ‘Auto Reboot’ and ‘F.Reset Time’ check-marked by default. If the stock firmware packaged contains a single tarball only, then simply load it in the AP button. But the if the packaged contains individual binary files just load each firmware binary files to their designated slots in Odin such as: the “BL” (bootlooder) file goes to the “BL button/slot“, same goes about the “AP” (phone), “CP” (modem) and the “CSC” (consumer code) files. Once loaded, you need to wait for a while as Odin3 will check the files compatibility and authenticity.

Connect the phones into the computer

Connect your Samsung Galaxy S2 GT-I9100 to the computer using the supplied USB data cable. In Odin window, the ID: COM box will turn to a bluish color when the phone is properly connected and it’s an indication that it’s recognized with Odin. It also states as “Phone Added! in the log-cat.

Begin flashing the stock firmware

When all is set and you are ready into flashing just simply tick the ‘START’ button located at the lower part of Odin.

Avoid interrupting the process

DO NOT disconnect nor do anything when the phone is already in download mode and flashing status. You’ll messed up the phone if you accidentally interfere the installation process.

Wait until the Pass!! message appears.

Odin3 will display a message that says “PASS!” when the process finishes. Wait until the phone completely reboots, then unplug it from the computer. However, if you might get the error message “FAILED!” you may check the troubleshooting procedures down below.

Troubleshooting Odin3’s “Failed!” error

Do performing factory reset after flashing is necessary when the device previously runs on any modified ROM and unofficial firmware images?

This process is optional, but this method can get rid of the unwanted bootloop, rebooting issues, freezes and lag issues after the new firmware installation.

Press and hold Volume Up+ Home+Power button, then select the Wipe Data/Factory Reset, to gain a fresh firmware installed.

Odin keep on failing and I’ve tried everything to the letter but still nothing works. What else can you suggest?

You may have tried rolling back to an older firmware version. Noting that newer updates will not allow you to downgrade to an older firmware version. This is why Samsung and Google frequently released the Android security patches in a monthly basis. You must carefully keep an eye of each firmware build version.

Please check back my insights about the stock firmware above. Also, if you’ve use the stock firmware to unroot and or restoring back from a modified system images but cannot get through during the firmware flashing and you’d get the Odin3 fail error, you may first sort things out like what root kernels and custom ROM, and any modified system images you have previously used before and try to find an answer to why it causes a flashing failure. Sometimes the problem is not on the stock firmware but lies in the modified system image you’ve used that causes the problem of not letting it through pass in Odin3.