Not everyone wants or needs to upgrade to a new smartphone every year (or even every two years). In fact, some people are quite content with their four- or five-year old devices and continue to use them to this day. However, for users of smartphones running legacy Windows Phone operating systems, Microsoft is making it harder to remain stuck

Source: Hot Hardware – Microsoft Cripples Legacy Windows Phone 7.5 And 8.0 Devices By Killing Push Notifications