: Power off the phone. Hold Volume Up + Home + Power until the Samsung logo appears to enter recovery mode.
: Your phone must be rooted , and you must have a custom recovery like ClockworkMod (CWM) or TWRP installed. Files Needed : CyanogenMod 11 (Android 4.4.4) zip file. Google Apps (GApps) for KitKat zip file. Samsung USB Drivers for your computer. Installation Steps download android 4.4.4 kitkat for galaxy s
: Connect your phone to a PC and copy the ROM and GApps zip files to the internal storage or root folder of the SD card without extracting them. : Power off the phone