how to unlock samsung u600 freely

grabbit:
This will unlock it

BACK UP YOUR FILES BEFORE UNLOCKING
This will also bring the phone to default settings
1. First do a CUSTOM reset: *2767*2878# (star 2767 star 2878 hash)
turn off the phone
2. take out the battery and sim and put wrong network SIM and insert a half of it,
so it won't ask for network password and shows "Insert SIM" message.
Now put the battery ,and switch the phone on .(phone shows "Insert SIM" message.)
3.With out turning off the phone push the sim fully in. At this stage the phone is still asking to "Insert SIM"
4. Make a FULL reset by typing: *2767*3855#(star 2767 star 3855 hash)
5. The phone should reboot working with "wrong" sim inside.
6. Make a Change the NCK password to 8 zeros by typing: *7465625*638*00000000*00000000#
(star 7465625 star 638 star 8zeros star 8zeros hash)
7. Now Disable network lock By typing: #7465625*638*00000000#
(hash 7465625 star 638 star 8zeros hash)
Phone is unlocked (check with *#7465625#)

grabbit:
Not sure why thats not working,

Saw this solution for a U600 and people reporting back that it worked for them but haven't tried it personally,you need the cable that came with the phone

download lucifer 1.03 by OTMAN-GSM

Power the phone , connect to PC ,select right port COM in soft

Start software and dont try to read the codes or unlock !!!

In the Phone Reset select "Stack reset" and push on "SET"

Wait until all ok then disconnect phone , pull out battery

and insert .
PHONE UNLOCKED