http://forum.gsmhosting.com/vbb/11140031-post1.html
post above is for imei repair but you can take example from it
connect clip to pc
select s-off first than save to drive
insert clip to phone boot phone pressing volume down
select simlock on screen than wait for process to complete
if successful than connect clip to pc and select lock option
do enter phone imei in given box and save to drive
repeat phone process