This is illegal. They never say this and even now no one knows their data bundle size. Are all the providers using same size or different and how different.
For years Our TRC is sleeping for this type of illegal actions by Dialog and there may be some reason (perhaps corruption). But when others come to know they also do the same as they are immune. TRC cannot only take action against non Dialog providers. This is only one there are numerous other methods which are illegal . I do not know why our intelligent people are silent, social media are made to prevent this kind of illegal and anti competition acts. But our people use social media only to sling mud at others.