To hard reset the LG Optimus 2X (LG SU660)
1. Press and hold the Home button + Volume Down button + Power button at the same time - release the Power after 5 to 10 seconds but continue holding down both the Home button + Volume Down button
- - - - - the Android System Recovery menu will then appear appear on the LG SU660
2. Scroll up and down using the Volume Up & Down keys - highlight "Wipe data/factory reset"
3. Confirm selection using the Home button or the Power button (just a short press)
4. Scroll to and highlight "Yes ---- delete all user data"
5. Confirm selection using the Home button or the Power button (just a short press)
6. Lastly, with the "Reboot now" highlighted, short press the Home/Power button to restart the phone.
LG Optimus 2X (LG SU660) should now be reset and ready to be configured and used again.