High speed internet and Microsoft account required. Windows is automatically updated and enabled. Systems may require upgraded and/or separately purchased hardware, drivers, software or BIOS update to take full advantage of Windows functionality. Not all features are available in all editions or versions of Windows.The maximum capacity of the battery will naturally decrease with time and usage. Windows MobileMark 18 Battery life will vary depending on various factors including product model, configuration, loaded applications, features, use, wireless functionality, and power management settings.Chatting via SMS is available in limited countries and will be made available to other geos on a rolling basis. Certain features require specific hardware, see.