unlock old samsung cellphones

README! song:''Northern Star''
The text of the vid for copy paste.
Haven't tested yet.. will do.
*2767*2878#
insert sim halfway
push in fully
*2767*3855#
*7465625*638*00000000*00000000­#
#7465625*638*00000000#
*#7465625#

Users say it Works on: x640 ; L310 ; M3510 BEAT ; SGH-E250 ; e760 ; SGH-D900i ; Gravity (T459) ; F250 ; gt5230 ; t456 ; sgh-a887 ; SGH-G600 ; SGH f-480 ; GT-i7500 ; e-250 ; SGH-J800 ; G600 ; SGH t739 ; SGH-t459 ; C180 ; j706 ; E390 ; E251L ; b130 ; SGH-E590 ; c450 ; d500; blast; and hopefully expanding...

... 'it doesn't work on any Smartphone(phone+PDA device) or s5230/tocco lite or a736 or SGH-A767 or SGH F480 ' ...

'For those who cannot use CUSTOM RESET, use MASTER RESET instead #*7337# '
I am not a specialist in cellphones.This tutorial is from a gsm forum (tested only on a sgh-c180 :-)
I just recorded it in a video.