<P> Windows Mobile's market share sharply declined to only 5% in Q2 of 2010 . Microsoft phased out the Windows Mobile OS to focus on Windows Phone . </P> <P> Windows Phone is a family of mobile operating systems developed by Microsoft for smartphones as the replacement successor to Windows Mobile and Zune . Windows Phone features a new user interface derived from Metro design language . Windows Phone was replaced by Windows 10 Mobile in 2015 . </P> <P> The Symbian platform was developed by Nokia for some models of smartphones . It is proprietary software . The operating system was discontinued in 2012, although a slimmed - down version for basic phones was still developed until July 2014 . Microsoft officially shelved the platform in favor of Windows Phone after its acquisition of Nokia . </P> <P> Bada platform (stylized as bada; Korean: 바다) was an operating system for mobile devices such as smartphones and tablet computers . It was developed by Samsung Electronics . Its name is derived from "바다 (bada)", meaning "ocean" or "sea" in Korean . It ranges from mid - to high - end smartphones . To foster adoption of Bada OS, since 2011 Samsung reportedly has considered releasing the source code under an open - source license, and expanding device support to include Smart TVs . Samsung announced in June 2012 intentions to merge Bada into the Tizen project, but would meanwhile use its own Bada operating system, in parallel with Google Android OS and Microsoft Windows Phone, for its smartphones . All Bada - powered devices are branded under the Wave name, but not all of Samsung's Android - powered devices are branded under the name Galaxy . On February 25, 2013, Samsung announced that it will stop developing Bada, moving development to Tizen instead. Bug reporting was finally terminated in April 2014 . </P>

Name of the nokia mobile phone operating system