How to Update iOS 6.1.2 & unlock with ultrasn0w on 3gs

Step 1 : Restore latest version iPhone2,1_6.1.2_10B146_Restore ( after restore phone will in activation mode)
Step 2 : Open redsn0w_win_0.9.15b3
Step 3 : Extras > Select IPSW > iPhone2,1_6.0_10A403_Restore > Open 

Step 4 : Back > Jailbreak
Step 5 : Select install ipad baseband & unselect install cydia > next > put dfu mode (redsnow instruction) after reboot phone will activated 
Step 6 : Open evasiOn 1.4 and press jailbreak (for untethered your jailbreak )
Step 7 : Download ITOOLS & Ultrasn0w 1.2.8

Step 8 :After complete jailbreak open ITOOLS

Step 9 : connect phone to pc and open file system >var>root>Media>Cydia>AutoInstall 
(If Cydia & AutoInstall don't exist, create these folders as posted)

Step 10 : place the All DEB files(ultrasn0w 1.2.8) 
Step 11 : And reboot phone normaly 
Step 12 : After reboot your phone is UNLOCKED


more download links

hotfile : Ultrasn0w 1.2.8.
4share : Ultrasnow_1.2.8

hotfile : iTools.exe
4share : iTools.exe

Regard's

MT TECHNOLOGY

reza