way 2. PRESS AND HOLD VOLUME UP + Home Button (or VOLUME UP + DOWN)
Keep pressing these 2 buttons + press Power button for 2-3 Seconds
Release only power button, but KEEP pressing Volume up + Home Buttons (or VOL UP + DOWN)
With Volume down select wipe data/factory reset (3rd) > Press Power (or HOME)
Samsung GT-i9000 Galaxy S Format.
Samsung GT-i9000 Galaxy S Unlock Patten lock