By Rina Chandran MUMBAI (Thomson Reuters Foundation) - The Indian makers of a $4 smartphone hope its low price will allow millions of the poorest people to own a mobile phone in a market with only 10 percent penetration. Ringing Bells' Freedom 251 smartphone, whose launch in February crashed the company's website, is priced at 251 rupees - possibly the cheapest Android smartphone in the world. Ringing Bells pays fair wages to its workers and its pricier models will help offset the cost of the $4 phone, he added.

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