Tools used:: z3x box samsung & sdcard & usb cable for 5310

Procedure::

1.open z3x samsung
2.download update zip here>>>>

http://www.4shared.com/zip/w3X0jZzA/...1__update.html OR

http://www.mediafire.com/?w3dwb3vgw18rtcp
3.extract updatezip to sd card.
4.root phone by holding power button + volume up + home button
5.wait till recovery mode appears.......
6.then click arrow down for update sd card.....
7.look for iso zip file then press home button wait till process completed appears...
8.click reboot system now......
9.if it has lock pattern disable first....
10.WAIT FOR SUPER USER APPEARS THEN JUST ALWAYS CLICK ALLOW!!!!
11.click read info
12.press unlock.....then finished.....................done!!!!!!!