1.Charge your phone. You will need to have at least 80% battery life on your phone before you start the rooting process so that it doesn’t get interrupted by the power turning off. For best results, perform the root operation immediately after your phone has become fully charged.

2.Download UnlockRoot Pro. The software is available for free from the UnlockRoot website. Make sure that your device is supported by checking the documentation on their website.

3.Download the drivers for your phone. Most phone’s will install drivers automatically when you plug them into your computer, but if yours does not for whatever reason, you will need to download the drivers from the manufacturer’s website.
Make sure to download the correct drivers for your model and carrier.

4.Connect your phone to your computer. Use the USB cable that came with your phone. Make sure that your phone has been recognized by Windows.

5.Run UnlockRoot Pro. Select your phone for the dropdown menu. Press the Root button once you have selected your device. The root process will start automatically.

6.Put your phone in Download mode. The UnlockRoot software will display specific instructions for your device. Follow the instructions exactly in order to put your device into Download mode. Once your phone is in Download mode, the root process will continue.
Your phone will reboot after a few moments. It will then reboot again and enter Recovery mode.

7.Wait for the phone to reboot a few more times. As the phone reboots, you will see the progress bar in UnlockRoot fill up. Once the bar is full you will receive the message “OK, Root success”. Your phone is now rooted and you can use programs such as SuperUser and Titanium Backup.

for more tips and detailed explanation visit :http://www.nairacoded.com/how-to-root-your-adroid-phone/