Mobile World Congress, the biggest mobile device trade show in the world, kicked off this week in Barcelona, Spain, and a flood of news for smartphone investors has already emerged from the show. One major announcement came from Nokia (NYSE:NOK), which is introducing three new low-cost phones, named X, X+, and XL, running a forked version of the Android operating system. They are priced between approximately $120 and $150.

In this segment from Tuesday's Tech Teardown, Motley Fool tech and telecom bureau chief Evan Niu talks with host Erin Kennedy about the strategy behind the new low price point phones. He also discusses the company's diversification away from Windows Phone in finally releasing Android devices, and what this means for Microsoft (NASDAQ:MSFT) and its mobile ambitions.

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