Try 00000000
but the phone may be locked, can be unlocked by:
To Unlock KG800/LG Chocolate
1. Insert sim from the network that it is locked to.
2. Turn on phone
3. On home Screen, Slide up phone
4. Type 2945#*#
5. ENG. Mode menu should appear
6. Go Down to Factory Reset Select it, may take a few minutes to reset!!!!!
7. This will reset the phone back to before the Phone was locked to a network
8. The phone will automaticaly Restart(Note The Network Logo At start up will not change)
9. Now insert Any simcard(Not tested with 3 sims)and the phone should turn on normaly
10. The phone is now unlocked and you can customise the setting as you like.