root unlock S7710

i av tried to unlock S7710 without succes bcoz ask to be rooted but not found root plz how can i get root of this phone?

UNLOCK INSTRUCTIONS:
Phone must be rooted!
If the software can’t root the phone automatically,
then you must root your device manually.
1. Power on the phone.
2. Enable ‘USB debugging’ in
‘Settings’-‘Applications’-‘Development’ for Android 2.x or
‘Settings’-‘Developer options’ for Android 4.x.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Select device in ADB settings.
5. Press ‘Unlock’ button.

Operation: Unlock
Selected model: GT-S7710
Software version: 23.9

Waiting ADB device… OK
Reading phone info…
Model: GT-S7710
Android version: 4.1.2
Product code: GT-S7710TAAFTM
Phone version: S7710XXANE3
PDA version: S7710XXANE3
CSC version: S7710FTMANE1
CSC country code: France
CSC sales code: FTM
HW version: MP 0.900
Phone S/N: RV1F30CGHJL
Modem board: DB8520H
RF cal date: 2014.03.06
IMEI: 352735060420960
Checking Super user right… false
This model not supported for auto root

Done with Samsung Tool PRO v.23.9