HOW TO ROOT ANDROID DEVICES

Before you start bear in mind that you will loose your warranty when the phone is rooted.
DISCLAIMER: DO IT AT YOUR OWN RISK
STEP 1:
Download z4root from websites like http://android.sc/download-z4root-apk-v1-3-0/ or simply search Google for z4root and you will be given options.

STEP2:
Copy the downloaded app to your memory card by connecting your phone to the computer via cable

STEP3
Disconnect your phone from the computer and open the SD card by use of any file manager you have installed.

STEP4:
Scroll down to the app you downloaded and select it.You will be asked to install and you will have to accept.
Sometimes you will find that you have not enabled installation of apps from unknown sources.In this case a pop up will appear asking you to enable it.Accept by selecting and then use the back button to go back to the file manager and install z4root.

STEP 5:
Now open the installed z4root app from the apps list and it will give you two options to root your device: permanent root and temporary root.Choose the one you want. The now rooted device should reboot and you are good to go