: Charge your battery to at least 50% and manually back up all data .
to , you must use a custom ROM, as official support ended with Android 2.3 Gingerbread. The most common method involves installing CyanogenMod 11 . Preparation & Prerequisites Device Compatibility : Ensure your model is specifically the download android 4.4.4 kitkat for galaxy s
. Using files for other variants (like the Galaxy S2 or S3) can brick your device. : Charge your battery to at least 50%