Azteco is the world's easiest to use Bitcoin service. Users purchase Azteco Vouchers identical to the globally familiar paper vouchers sold by O2, T-Mobile, EE, MTN and all other mobile phone networks. Azteco Vouchers are the same in function to the gift cards sold by iTunes, Amazon, and the thousands of gift cards with redeemable codes sold in supermarkets. Azteco Vouchers are redeemable directly to the mobile phones of consumers, working the same way that top-up vouchers do to add call time to Pay-as-You-Go mobile phones. The vast majority of mobile phone use on earth is via Pay-as-You-Go, with users topping up by paper vouchers with a QR code. Now this convenience will be available for users of the Bitcoin network.