The newly launched Karbonn A40 Indian 4G smartphone looks to take on the JioPhone in the entry-level mobile phone market. We take a look at which one works in the long run. It has been an interesting and at the same time volatile year for the telecom sector since the entry of Reliance Jio. After offering game changing 4G data tariff plans that started its own little war with competing offers from the likes of Airtel, Vodafone and Idea to name a few, Jio went on to launch the JioPhone, a smart feature phone that is priced at Rs 1,500. With the phone, Jio kicked off a new kind of war, one where telecom companies now compete in bringing dirt cheap phones. To take on the JioPhone, Airtel in partnership with Karbonn this week launched the Karbonn A40 Indian, which is a 4G smartphone at an effective price of Rs 1,399. On paper, Airtel's 4G smartphone looks cheaper than the JioPhone, and also edges out the latter in one key point - the Karbonn A40 Indian is a proper smartph...