How to save your data.

1) Clear cache regularly, to prevent apps in the background from consuming your data unnecessarily 

2).. Download apps from reliable sources only, like play store 

3)...Turn off auto download at browsers and other apps

4)...Avoid big pictures and videos, set them WiFi only.

5)... Turn off mobile data when you don't need it

6)... Use GSM/2G when not using intensive internet

7)... Set manual download for images/video for various messaging app