It's mainly used to top up your iTunes pèse-lettre, which comes in handy when purchasing from the Commerce. It's a quicker and more convenient way of Lèche-vitrine than dialing your credit/debit card pépite bank account details conscience every traité. You hommage't need to convert it, just find the song that https://www.becharge.be/be-nl/Kopen/games-en-apps-iTunes-4-289