How many smartphone operating systems are there?

Are there any other smartphone operating systems in addition to Android, iOS, Windows Phone and BlackBerry 10?

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JanSt / MOD  Nov. 7, 2014 at 20:18

Android, iOS, Windows Phone, Firefox OS, Sailfish OS, Tizen (no phone yet, right?), Ubuntu Touch OS, Blackberry

Discontinued OSs

Symbian, Windows Mobile, Palm OS, webOS, Maemo, MeeGo, LiMo

More info and smartphone and mobile operating systems over on


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