Databack is a app which refunds data.The main concept of this app is that it gives or returns the some amount of mobile data which you use.Idea of this app was fantastic but in reality they are cheating the users. Firstly , databack refunds only that data which you spend on using apps which are registered on facebook.Most of us spend our majority of our data on surfing on chrome or some other browser like uc browser , but databack does not refunds these data.It refunds data spend on apps like facebook, whatsapp, flipkart, amazon, etc. And the most annoying thing is that you cannot recharge unless your refund data reaches 150 mb.Also you cannot recharge for more than 250 mb at a time.Once you have recharged then you have to wait for next 15 days to recharge another.
So I would not advice you all to fall in the trap of DATABACK.