The Freedom 251, (Freedom 251 Mobile Just in Rs 251) touted as India’s cheapest smartphone and likely the most affordable smartphone in the world as well – will sport a price tag below Rs. 500 (approximately $7). At Rs. 500 (just $7) Freedom 21 might just be the cheapest smartphone in the world. 4″ (10.2 cms) Screen qHD IPS, 1.3Ghz Quadcore Processor, 1GB RAM, 8GB Internal, 3.2AF Rear,.3 MP Front, 1450mAh Battery.