iPhone4 sales have trebled during the last five days over the preceding week, surpassing the demand for the iPhone5 in India, as customers rushed to avail of the recently launched buyback scheme, said four large handset and electronics retailers. Apple is offering a discount of at least Rs 7,000 on the iPhone4 in exchange for any smartphone.

Samsung will hit back soon as it is offering its products by lessing  up to Rs 5,600 on mid-to-high-end Galaxy phones and tablets such as the Galaxy Tab, SIII, Grand and Note II that are purchased through credit cards. As per estimates, around 80% of the Rs 15,000-plus handsets and tablets are bought on credit or debit cards.