Airtel says 3 GB data is free, when it's actually INR 100 per month. It's quite common to see Airtel using/misusing the word 'free' in its marketing material to refer to paid things. Doesn't look accidental - looks planned.
Update: Airtel says it's offering "free voice calls to anywhere in India", but there are two key problems:
- Only one of the two listed packs offers zero-charge calls to any network across India.
- These calls cannot be called "free", since in order to get them you have to recharge with a paid pack.