For you to get this free 4GB data on your Airtel sim, just do the followings:

Go to any sophisticated Airtel center an buy a new 4G SIM or you can also retrieve your old 3G SIM for a new SIM that is if you have one.
Get a 4G enabled smartphone
Insert the 4G SIM into your 4G enabled smartphone.
Turn on your 4G enabled smartphone
Once your phone shows the 4G LTE signal, you will receive your free 4GB data at once.
You have successfully gotten your free 4GB data
You have gotten this free 4GB but how can check your data balance?

How to Check Airtel Free 4GB Data Balance

Whenever you want to check your data balance for this free data, just use the normal code for checking Airtel data balance by simply dialing *140# for more tutorials click here

You will see your data balance immediately you dial the above code.

It is important to note the following facts about free 4GB data on Airtel 4G sim

Facts You Must Know About This Airtel 4GB Free Data
This free data can only be gotten on 4G sim
You get it once not twice
It is valid for one month
It does not require any code for activation unlike double data that needs code for activation
It can only be gotten with a 4G enabled smartphone
It only works on 4G network which means you need to be in area that supports 4G network.

for more latest cheat click here

this is an old news nah.. and it is not a cheat because Airtel is aware of it... I'm tired of some op