Have been using MTN Nigeria for the past 20years,but recently MTN tariff has bn on high side,both data and Airtime,I loaded a airtime of #200 I called only one person with 1 minute 30seconds and I I send a text to only 1 person also,when I was about to called another person,MTN voice over was telling me 1 minute remaining,how did w arrive at buying 200airtime without using it to call up to 4 minutes,same thing happened to my data plan,I hardly use data plan of 1gb just for a day,just only on WhatsApp and at time check my Facebook before you know all the data is bn exusted,like seriously MTN Nigeria need to do something about there tarrif and reduce the price of data in the country