I have been trying to get the Kindle app to work for days now, I am in the UK, and having some problems with it... I can download any of the sample books, but I cannot download any full books. On Amazon.co.uk it will let me enter my credit card details, but the Kindle store is on Amazon.com, and I cannot enter any of my stuff on that, so it will not let me download any books to use on the app. Firstly on Amazon.com, it only doesn't let me select my type of card, and then also if I enter stuff, it says I haven't included the right date that the credit card was valid from, despite the fact there was never a box to enter the start date in. Why can't these Android apps just work?