Samsung has launched a buy back and upgrade offer for its Galaxy range of smartphones in India, a move aimed at attracting more consumers who have started to prefer handsets with similar features at lower cost from home-grown companies. The offer comes at a time when South Korea-based Samsung is facing pressure from local rivals such as Micromax Informatics Ltd. and Karbonn Mobiles which have been slowly gaining market share over the past few quarters. In the third quarter of 2013, Samsung had a dominant 33% market share in India, but its share has fallen from 46.1% a year earlier. Micromax had 17.1% of the Indian smartphone market as of the third quarter, nearly doubling its share of 8.1% from a year earlier, data from market research firm IDC showed. The program launched earlier this week by Samsung and technology products distributor Ingram Micro will allow consumers to buy a premium Galaxy smartphone and upgrade in the future without extra cost by trading in their old phone.