Beyond iOS and Android, 8 Best Mobile OS in The World
#1 Series 40
Series 40 is a mobile platform and application user interface (UI) software on Nokia's broad range of mid-tier feature phones, as well as on some of the Vertu line of luxury phones. It is one of the world's most widely used mobile phone platforms and found in hundreds of millions of devices. Nokia announced the platform on 25 January 2012 that the company has sold over 1.5 billion Series 40 devices. S40 has more features than the Series 30, which is a very basic OS. They are not used for smartphones, in which Nokia primarily uses Windows Phone, and up until 2012 Symbian. However, in 2012 and 2013, several Series 40 phones from the Asha line, such as the 308, 309 and 311, have been classified as "smartphones".
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