How To Activate Airtel's 20mb Data Plan [Nigeria]

I know that some of us are already aware that Airtel Nigeria has now changed their 10mb internet subscription to 20mb.
So, for those of you who didn't know about this latest development, now you know.

To activate the 20mb data subscription Dial *141*712*11# from your mobile phone.

To check how much you've used from your data subscription Dial *141*712*0#

Cheers!!!