It's been over a year now since you asked this question, but I think this answer will benefit others.
Log in to your MiFi's dashboard at mtnbroadband.ng
Go to Device...
Kindly read through the details that have been provided above, and let me know where you need further explanations so that I can go over the information again.
~Ighedoise
Hi Femi, you need to contact your bank to know if they have the service to enable you buy airtime from your bank account. You can also use your bank ATM to buy airtime via the...