But I promised myself to post it out for others to enjoy it too before Airtel discovered the loop-hole and blocked it.
The truth is, with N100, you can get multiple of 10MB or with N1200 to get multiple of 1GB and using N2800 to get multiple of 3GB. But the fun about this trick is that, you will still retain your money after trick. (Your money or airtime you used will still be intact).
Follow below steps to get unlimited MB or GB as much as you desired.
Now, to get multiple of 10MB using N100 airtime, you will need to do the following:
1. Get a Nokia torchlight phone (This is were you will insert the airtel line cos it allows the user to do another operation while making call)
2. Get any MTN sim. ( You'll be using your airtel line to call this other line later)
3. Save this code *440*6# on your Airtel contact with the letter A for easy access when the needs will arise.
Note: You must have N100 on the dot on your airtel sim. (meaning nothing less than or more than N100 you should have. your account must not be reading N101 or N102.........It must be N100 or any other amount of subscription you're going for else, your money will be wiped off)
Now call your MTN sim (You must not pick the call on your MTN line no matter what) using the airtel line you want the databundle on, while the MTN line is ringing, quickly rush down to your contact were you saved the code (*440*6#) and send it immediately.
When you might have done that, you will receive a flash message on your screen telling you "An error has occurred" if you see such message, you should have be given 10MB and your airtime still remain intact. Now, go back and end the call. This code can be sent 3 times atmost on a single call to get 30MB per call you made to the MTN line.
Repeat the above steps over and over again to get as much MB as you want.
To get multiple of 100MB, use this code *440*222#2# and you load N400 on your sim instead.
To get multiple of 1GB, use this code instead *440*4# and you load N1200 on your sim. Same above trick you will do to get multiple of 1GB too.
To check your Data-Bundle balance, dial *141*712*0#
Note: once the operation did not end before the call terminate, your money will be deducted which you will only need to send 'stopautorenew or 'deactivate' to 440 and continue the trick again.