How to Root Xiaomi Redmi 3 without PC & unlock Bootloader

Step 1: Enable USB debugging
Step 2: Settings > Addtional settings > Privacy > enable Unknown source
Step 3: Download files Root_Xiaomi_Redmi3.apk or Mirror
Step 4: Install Root_Xiaomi_Redmi3.apk file. Then open and press Root, the process will take place automatically until Root completed