While your phone is powered off,

1. Press and hold [Volume Up], [Home], and [Power] buttons together.
2. Release them when the Galaxy S boot up animation is shown.
3. Select "wipe data/factory reset" to hard rest. Use the [Volume Up], [Volume Down] to navigate through the list, and [Home] to select.
4. Lastly, select "Yes -- delete all user data" to confirm the hard reset

Remember how dell makes customising your own pc ever so easy?

Now someone has done the same for building your own roms for galaxy s.

Head out to http://romkitchen.org/ to build your own rom now!

Press *#272*HHMM# for android 2.1, or *#272*IMEI# for android 2.2 in the dialer, where HHMM is hour and mins in 24hr format of the current time

Singtel users choose SIN

Starhub users choose STH

M1 users choose MM1

for naked sgs rom, choose XSP

Select your option and click the install button to complete the setup.