Found it on the net:
"...Code Calculator By CyberGSM v5.4
At the bottom of the screen once installed will be a Samsung/NEC Button.
Click on that and from a drop down select the E616
Codes worked perfect for 2 of my phones, this solution is per sim card only, ie if you regularly use more then one simcard then the code will have to be rentered.
A permanant solution can only be acheived by a cable unlock. I'm sure software will follow soon..."