Since the telecommunication companies have suffered from huge losses uto 18000 crores due to whtasapp or any social networking applications.
Nobody is buying now a days there text msg packs. This companies want to recover that amount so they are now come out with new tricks which many people dont know specially postpaid users.
Trick is when people use internet if they have exceeded there limit then they will not cut off data immediately after data pack is over they will still keep it on. And after you have used exess data upto Rs 500 exrta data that time they will send a message. People will call afterwards costumer care but they are alredy traind how to fool you guys. So this is there way.