5. Windows

Next, we cannot forget to mention Windows Mobile OS. In fact, some people find it easy to use while some others do not. The latest version is Windows 10 with a colorful and user-friendly interface and it is also the firm’s first attempt to “unify their desktop, tablet and phone operating systems into a single OS,” which means Windows 10 on a smartphone shares many of the same features as its desktop version. Apart from Microsoft, some manufacturers that have been producing Windows phones are HTC, Samsung, HP, and so on.

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