All Nokia Lumia smartphones run the Windows Phone mobile operating system. The first-generation Nokia Lumia 510 smartphone ran Windows Phone version 7. In March 2015, Nokia released new Lumia 640 cell phones that operate on Windows Phone 8.1.
Nokia cell phones come with customizable features including a camera that can take a burst of pictures and a voice-activated personal assistant named Cortana. Windows Phone offers access to Word, Excel and PowerPoint documents. Windows Phone users can also make Skype video calls with a Nokia Lumia smartphone. Nokia phones for Windows Mobile are available from service providers and at eBay and Amazon.com.