It is no surprise that you call them and it goes without you having credit.
It is called call-collect. MTN does it for Guinness and Coca cola, and some other
private individuals, like one oil merchant at Ibru Jetty, Lagos that I won't
mention his name for privacy sake. (I remember the Guinness number is 0803 - - - 1759)
These guys get call-collect from MTN, use it to scam people and disappear.
They deposit maybe N15,000 into their call-collect account and then scam
people up to N400,000, do you say it's bad business for them?
Run for your dear life, there is no free lunch anywhere.
Those guys are professional 419. I have seen them doing the fraud where I live,
that's why I quickly made that post. Don't be scammed if you'll listen to me.
It's your money though, do whatever you want with it.
But I prefer we meet in the next bar and have some drinks and fish,
than giving it away to a hungry fraudster