First Root It (Step By Step Rooting Guide)
1. Download the file attached in this post and copy it into your external SD card
2. Switch off your phone and boot into recovery by holding Volume Up + Power + Home buttons (Stock recovery is able to flash this file)
3. Navigate by pressing the Volume Up/Down button and choose "Apply update from external storage" by using the Power button.
4. Select the file Kinguser-3.4.0.zip
5. The phone will auto reboot and gives root access
Kinguser-3.4.0 - Download - 4shared
After Root Turn On Usb Debbuging Then Repair Imei