The reason I had decided on this smartphone was just the operating system Windows 8.1. After evaluating the many reviews here on Amazon, I had decided on the Nokia Lumia 630. On the one hand was the decisive factor of price and secondly the removable battery. There were also technical parameters. For me as a normal smartphone user then the Lumia 630 the optimum. If you like games with liquid smartphone, can opt for the Lumia 635. Since the Windows Appshop will be further expanded, I assume that soon Apps for Windows 8.1 are available that were previously only work on iOS or Android devices. For me, the Nokia Lumia 630 is a thoroughly enjoyable Smartphone with potential ...