Iphone 6 from the US works on the 1800 Mhz . Majority of the 4G Lte being launched in India is now on the 1800 MHz . It is much more cost effective and more on the international lines and hence all the major telecom companies in India are in the 1800 MHz . Except for the Airtel initial launch in the 2300 MHz . Hence the iphone 6 from US should work seamlessly in the proposed 4G networks in India in the time to come .