Explain fast data usage

The National Letters

HAVE you noticed that a mobile network company’s data plans for K3 and K5 finishes quickly within 10 to 15 minutes of purchasing?
The automated message pops up shortly after you purchase a data plan to warn you that you have just a few data left.
That happens just moments after you start using the internet.
Can the relevant authorities look into this?

Gideon Morte Sakao