Check on your most visit location.. like your house, office, and where you hangout and also where is your hometown... common area. Ask around also. But for me i dont see any issue so far.

I think it depending also.. Most prepaid user data is already within the 30-50 already. I think most prepaid user uses more data rather than call. Thats why they still on prepaid.. Thinking of using postpaid plan but you dont always call, some might think its abit wasteful.