So you forgot your
USER LOCK CODES for your Nokia 1110i ??? is that right??? (not network unlock codes?)
If USER CODE RESET
Please try default nokia user code
12345 if this code does not work just goto any mobile unlock shop and just buy them a nice hot cappuccino and they will do it for free (easy to do with any unlock box).

i was trying to say that it is not much hard or expencive thing for unlocking guys.
(1110i phone does not have memory card so can not reset the user code with free software posted on elakiri by me)
If Network Lock (cant use different sim cards)
This is where you need the IMEI (even with imei you can not unlock 1110i, u need to flash the phone with a special patch FW to unlock, must visit unlock shop, cost you around $20)
try 12345 default user codes (phone lock codes)
hope you are not confused with netlock code and phone user code
regards