Dear 2 degrees. 
When shall you be implementing worry free data on prepay? I ask because i had the unfortunate experience of over $40 credit being wasted on casual data when my 12GB MBB pack ran out recently. As my sim  is in a mifi I did not receive texts in a timely manner. [fact]  using up all my credit on casual  data is unethical. Casual data should be an opt in thing. Salty can you please change the system so when data pack runs out,  data stops? It would be much better to know when it's time to top up in order to buy a new pack, before the credit all disappears.  Please sort this out. Thanks