: Power off your S2. Press and hold Volume Down + Home + Power . Press Volume Up to confirm.
If you have a .zip version of the recovery and an existing older CWM version, you can flash it directly: : Power off your S2
: Power off the phone, then press and hold Volume Up + Home + Power buttons until the logo appears. Flashing the Zip : Select Install Zip -> Choose zip from sdcard . Navigate to the downloaded .zip file and select it. : Power off your S2
CWM Recovery is a popular custom recovery for Android devices that allows users to perform advanced operations, such as: : Power off your S2