Are you an Airtel subscriber and also load airtime frequently for data or calls, this is for you.
Some years ago airtel have a platform for his customers whereby for every N10 naira spent om your phone you get 1 point.
Apparently, this is still ongoing. I stumbled upon it while calling their customer service on day and since then, i have converted my points earned to data thrice. This is how its done.
Ps: if you try it and it doesn't work, that means you are not on the platform. Sorry.
Dail 111 then follow the voice prompt by
Pressing 1 for english, 1 again then 5 for points, then 1 to check number of points. When u know the number of points, end the call ans call 111 again then press 1,then 1, 5, 2 to convert to data, then 1 for monthly subscription etc.
GOOD LUCK