Thanks ilovejedd.
I hope Jedd knows
Been looking and reading more things and seems I couldn't register if I wanted too, need a credit card or gift card. Pity they don't sell gift cards in SA like uber, netflix, iTunes and play. Would save me some hassle buying a amazon card over the freeken play cards.
Yes my initial question was about kindle using my phones data up, but seems I have received other important answers. Thx.