These are my verified instructions on how to take a Samsung S2 stock ROM phone that is not rooted to a fully rooted phone with cyanogenmod rom installed.
Prerequisites
- Samsung S2 International Phone
- Odin 1.85 (later version should work)
- The Samsung drivers installed (these are part of kies or use the standalone installer)
- cm-10.1.3-i9100.zip ROM
- cm-11-20141230-NIGHTLY-i9100.zip
- Slim_mini_gapps.4.4.4.build.8.x-385.zip(optional)
- Siyah-s2-v6.0b5.tar Kernel
Instructions
- Put your phone into download/ODIN mode by powering on with the following combination volume down+home+power
- Press volume up to continue
- Plug your phone in by usb cable to your PC
- Install and open ODIN
- Verify that your phone is recognised, you should see an ‘added Message’. If you do not it is likely that your drivers are not installed or are incorrect. You can check this in device manager. The driver should be referenced as ‘SAMSUNG Mobile USB Device’. If the phone is recognised as unknown manual select the correct driver and if ‘SAMSUNG Mobile USB Device’ is not present, install the drivers and recheck
- Once you have your phone detected, click on PDA
- Select Siyah-s2-v6.0b5.tar
- Click start
- When this is done, a successful message will appear
- Disconnect your USB cable
- Power off the phone
- boot into CWM recovery mode power+up+home button
- install the cm-10.1.3-i9100.zip – we need to install this so that we have a compatible kernel to upgrade to Cyanogen 11
- wipe data/factory restore
- wipe cache
- power off – we need to do this so we can load the new version of clockwork mod that has just been installed
- boot into CWM recovery mode power+up+home button.
- Install cm-11-20141230-NIGHTLY-i9100.zip (if you get a context error, boot the phone and see if 11 is present, if so install the v11 rom again to make sure it is clean)
- Boot android
- run the cyanogen updater and put the latest version on
- power off
- boot into CWM recovery mode power+up+home button
- install Slim_mini_gapps.4.4.4.build.8.x-385.zip – so you have the normal android apps