Samsung unveiled a solar-powered phone at the Mobile World Congress in Barcelona, Spain, earlier this year and introduced its first sun-powered phone in India in mid-June. The company expects its Solar Guru model to perform well in India, another country where electrical supply can be erratic.

Unlike many technological innovations, the solar phone is making its big splash in developing nations, where the need is the greatest. After the Solar Guru is in circulation in India, Samsung said, it plans to launch similar phones in other Asian markets, Europe and Latin America.

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