To root android download framroot app from here:-
App works with most of device.
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step 1:- Install framaroot app.
step 2:- After install open framaroot.
step 3:- Select first option "Boromir".
step 4:- Then you have a message "Success :-) Superuser and su binary installed. You have to reboot your device"
if it's fail then try second or third option "Faramir" or "Baramir".
Step 5:- After success just reboot your device.
Rooting done. Thank you.