Why is there a difference in the 500mb data pack between prepay and PostPay (300mb/$10 vs 500mb/$10) when all the other data packs are the same price?$10/500mb is my personal 'sweet spot' but I currently need to buy it through my wife's postpay shared data rather than just getting it directly on my own prepay account - somewhat of a pain when I run out of our combined data and have to ring her to get the bigger pack AT THE SAME PRICE?
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