Not long ago, MTN had some problems with their system and thousands of Nigerians was able to get into their system to accumulate hundreds of gigabytes but MTN discovered this trick because of some reports from snitchers and it got blocked.
MTN has start deducting back their data. As I have said earlier, everybody data will be deducted and you have to take action immediately before it penetrates into your normal account.
Is it helpful? Was your data deducted? How many data were you able to accumulate before the deduction?