Hello
1. Use FsT - Free Samsung Tool v4.0.4
2. Use universal box
3. Use D800 cable
4. Select in program E250
5. Frist try without sim card ..if don't work insert a unaccepted sim card in phone and POWER ON the phone
6. UNLOCK
Work for me...SUCCES
free Samsung4.0.4 F.S.T. 4.0.4 here :
http://rapidshare.com/files/73723154/Samsung4.0.4.zip.html pass : i-ztnawhcs