This review is for those who are wondering to take a new sim card and having toughts of taking airtel for 4g speeds despite high costs.
Pros:
The 4g speeds are really great.
Even not for 4g you will get signal most of the places even while you are travelling in train to some other state.
There are no data roaming charges
Cons:
Costs are damn high relative to other carriers
There will not be 4g every place you go while in most of the developed places have that.