Every custom firmware for Samsung Galaxy S II should be in ClockworkMod Recovery (CWM) zip format. It is easy to install firmware itself (through SD card), update patches, install mod, backup and restore. Note – install a new firmware will replace your existing firmware. Do a full system backup with CWM first if you wish to go back to the previous firmware.

Prerequisites

  • ClockworkMod Recovery
  • Firmware

In order to install firmware in CWM zip format, you need to have ClockworkMod Recovery on Samsung Galaxy S2 first. Follow this guide to install CWM ~ How to install ClockworkMod Recovery on Samsung Galaxy S2?

Step by Step Guide

  1. First of all, copy the firmware zip file that you want to install into sdcard (internal).
  2. Press and hold down Volume Up + Home + Power buttons at the same time.
  3. Release all buttons when you see SGS2 Logo.
  4. ClockworkMod Recovery will be loaded then.
  5. Select wipe data/factory reset. (You can skip this step if upgrade from same firmware)
  6. Then select Yes — delete all user data.
  7. Select wipe cache partition. (You can skip this step if upgrade from same firmware)
  8. Then select Yes — Wipe Cache.
  9. Go to install zip from sdcard.
  10. Then select choose zip from sdcard.
  11. Select your zip file (VillainROM-2.4.2-signed.zip in my video).
  12. Select Yes – Install your zip file.
  13. Reboot your SGS2.
  14. That’s all.

Enjoy your new installed custom firmware. :D

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