Help with Galaxy S II Jelly Bean Update.

[Ayush08]

I am new to this forum and this is my first post.

My Samsung Galaxy S II is on official 4.0.4 firmware. I wanted to know if I could update to 4.1.2 Jelly Bean official update using the "install update.zip from the sd card" option in recovery mode without rooting.

Thanks,
Ayush