You need
PC
USB
iRoot for PC
First
download the iRoot
then install
Second
Connect the USB to your PHONE
Third
Click the GreenButton or the Root Button
then your phone will be reboot
then BOOM ! ROOTED NA !
Tested on my SGS-Duos-2
watch my thread...
To unroot your phone
you need: Root Explorer and Presence of mind
First
Go to Root Explorer
Device>System>App>find superuser.apk then Delete
Second
Root Explorer
Device>System>Bin>find "su" file then Delete
then reboot ! Done
Requirements:
Samsung Galaxy S duos 2
iroot for pc http://irootdownload.com/
USB Cable or Samsung kies
First
Download iRoot for PC
Second
Install the iRoot
Third
Plug your phone to the computer using the USB Cable
Fourth
Check the USB Debugging to the Developers Option
if not find ...