lg ce0168 inser sim card error resolved

First All Check:
1.Confirm whether same sim card is working in other h.s or not.
2.Make sure the sim slot is o.k. only try these two.
3.If all the above steps fails, check the SIM card connector pins for damage.
if so try to get serviced.
4.if ur sim card is good then it is problum form sim card ic u have u raplace it with SMD.
u can make it jumper mean u can fix this prob with out sim card is for this contact.
5.take sim connector slight up by pin then cheak by inserting sim.
6.hot air gun on sim i.c. then cheak it.
Last Option:
IF make sure that the sim card hasn't been damamged at all sO Please You Go to Service
& Sim Office and Get the Duplicate Sim Same Your No From Office Oprator
Problem will Solved Quickly

Unlocked LG Chocolate

Yes I have successfully unlocked My LG Chocolate

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.

I have tested this With LG Chocolate Locked on Orange, T-Mobile, Vodaphone they all work with O2, T-mobile, Vodaphone and orange Sim Cards