How to Flash Update.Zip on Android

1. Power down your Android phone.

2. Press and hold the volume up button, the home button and power button simultaneously until the custom recovery screen appears.

3. Push the volume down button to move down one menu option, then tap the 'Call' button on your phone to select the 'Apply Update From SDcard' option.

4. Move down again using the volume down button and then press the 'Call' button to select 'Yes - Install /sdcard/update.zip.' This will flash your Android phone with the update.zip file stored on your SD card.