To make the most of Windows Phone Nokia brand remains the best. Top quality and especially the Nokia applications that are a real plus. In addition, the 925 PureView with its flawless pictures. For music it is used as a USB key (copy paste MP3 files for ringtones Nokia application is perfect A Microsoft also has a contribution: Using SkyDrive, One Note, Office suite ... -.. > exchange between mobile and computer (recommended SkyDrive app for PC). The Nokia Lumia are computers working Simple, Efficient and Secure.