When you dial *559*10# the 6000 minutes to call a partner is a promo for mtn 2 in 1 sim cards! And you can only use it to call the second sim that comes with your 2 in one sim(that's if you have one). Don't let any blogger deceive you that it can call any number. Be informed! At projectnaija we only tell the fact. And this is an info that I confirmed from a friend that works at mtn
