The makers of the Rs 251 smartphone hope its low price will allow millions of the poorest people to own a smartphone. But labour rights campaigners worry that push to churn out cheap handsets and tablets may lead to greater abuse of workers' rights in India, the world's fastest-growing smartphone market. Ringing Bells' Freedom 251 smartphone, whose launch in February crashed the company's website, is priced at Rs 251 - possibly the cheapest Android smartphone in the world. On Thursday, the company's chief executive Mohit Goel said the first shipment of about 200,000 handsets was due next week. Read | Freedom 251 deliveries delayed, will now start from July 6 Ringing Bells pays fair wages to its workers and its pricier models will help offset the cost of the Rs 251 phone, he added. "Our vision is to make mobile phones more affordable to the millions of poor Indians who do not own one," Goel told the Thomson Reuters Foundation. India sold 103