I. Downloading Required Files:
1. ClockworkMod Recovery (Download link’s available in the first post)
2. Superuser ZIP (Download link’s available in the first post)
3. Odin
II. Installing ClockworkMod Recovery on the Samsung Galaxy S2 Plus (GT-I9105):
1. Download and place all the files to your Desktop.
2. Extract files from the Recovery as well as Odin archives to your Desktop.
3. Double-click on Odin executable file and it’ll launch.
4. Click on PDA and select the CWM Recovery file you extracted earlier to your Desktop.
5. Make sure that only Auto Reboot and F. Reset Time boxes are checked in the Odin.
6. Leave the Repartition box unchecked.
7. Turn OFF your device.
8. Reboot your device into Download mode by simply pressing and holding the Volume DOWN+Home+Power buttons together.
9. Press Volume UP button to continue to Download mode.
10. Connect your device to your PC using the USB cable.
11. Hit Start button in the Odin and it’ll begin flashing the Recovery.
12. Once the recovery’s flashed on your device, reboot your device.
13. And you’re all set!
Great! You now have a custom recovery up and running on your device, let’s see how you can root your device.
III. Rooting the Samsung Galaxy S2 Plus GT-I9105
1. Connect your device to your PC via USB cable.
2. Copy the Superuser ZIP file over to the root of your SD card.
3. Once copied, unplug your device from your PC.
4. Turn OFF your device.
5. Reboot your device into Recovery Mode. To do so, simply press and hold the Volume UP+Home+Power buttons together.
6. Once inside Recovery, select install zip from sdcard followed by choose zip from sdcard.
7. Select the Superuser ZIP archive you copied earlier to your device for flashing.
8. As soon as you select the file, it’ll start flashing it.
9. Once done, reboot your device.
10. And you’re all done!
