require

1. Odin

2. Samsung kies

3. custom kernel

4. custom ROM

5. Google apps

6. backup apps.

First of all backup all your data using backup applications(app backup and restore, sms backup, call logs backup) and backup your contacts from inbuilt application. Install Samsung kies on your computer(We need it because we need some drivers).

Note: There are two methods of flashing a kernel to your phone.

Caution: Be sure to copy your files before performing installation. This method is only for international version of Samsung galaxy s2 i9100.
Flashing via odin

Flashing via odin is an easy and automated task.

i) Turn your phone off and press these 3 buttons at same time, menu+volume down+power.


Result of Volume down+menu+power button



ii) Now press volume up button to reach downloading mode.


Result of volume up button

iii) Open Odin, check if your device is connected. It will show green or blue color box below ID com.


Odin for windows pc

iv) click on PDA button and browse your custom kernel file. Make sure auto reboot and F. reset time is checked(No other options must be checked).

v) click on start and wait till the process is finished. Your device will stuck on boot menu. If this is the case, you are ready to go.
Installing ROM

i) Hold volume up+menu+power button at the same time until you reach kernel menu.


install zip from sd card

ii) Choose install zip from sdcard(use power button to make selection).

iii) on next screen choose zip from sdcard or choose zip from internal SD as per your requirements(internal SD is phone’s memory).


choose zip from sdcard

iv) choose your file and select yes. Your custom ROM will be installed.

v) install Google applications from zip.

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