After now you can enjoy the new Android 4.1.2 Jelly Bean for Galaxy S2 and now the time has come to do the usual customization to your Terminal: it's time to get the root permissions!

Requirements

• You must have a micro sd, goes well with any size and speed.
• Download the Recovery "philz-touch_3.00_i9100-signed.zip" from this LINK and copy it into the external memory card.
• Download the file "Root_SuperSU.0.98-Busybox.1.20.2-signed.zip" from this LINK and copy it to the internal or external memory.

Procedure root Galaxy S2 with Android 4.1.2

1. Start the classical Recovery Samsung: from phone off hold down the VOLUME UP + HOME + POWER and wait until the Galaxy turns.
2. To move use the volumebuttons to select the Power button.
3. Select apply update from external storage.
4. Select the philz-touch_3.00_i9100-signed.zip file that you downloaded before.
5. Temporary way is loaded the Recovery Mod. This type of recovery is touch, and then to select the various items you can click directly with his finger (and use physical buttons as mentioned in step 2).
6. Enter install zip from sdcard. If the package to the root has been copied to the internal memory (sdcard) select choose zip from sdcard "internal , if copied to the external microsd choose instead choose zip from sdcard.
7. Browse to and select the Root_SuperSU.0.98-Busybox.1.20.2-signed.zip package you copied earlier.
8. On the next screen, confirm by clicking Yes –install Root ...
9. After installing the package back to the main menu and restart to reboot system now.