How to Install Samsung Galaxy S2 I9100 & I9100G Official Stock ROM Android 4.1.2 Update Jelly Bean

How to Install Samsung Galaxy S2 I9100 Official Stock ROM Android 4.1.2 Flash Update Restore

Download Firmware 

Download Odin 3.07

http://adf.ly/1PVZOs

Download Samsung Mobile Phones USB Drivers 

http://goo.gl/FJKVWY

The Official ROM File I Used For GT-I9100

The Official ROM File I Used For GT-I9100G