Step 1: Download Towelroot for android.
Step 2: Install Towelroot on your phone.
Step 3: Click on v3 for 3 times.
Step 4: Next change the code in the box to 1337 0 0 0 0 0 .
Step 5: Now click on 'make it ra1n' button.
Step 6: If the phone don't restart, your phone is rooted.
Step 7: For confirmation use Root Checker app.
[This post was requested by Alexy]