iPhone Duo starts at £1,999 in the UK and ₹2,99,900 in India for the 256GB model, according to Apple’s Store pages in both countries. That is £700 and ₹1,20,000 more than the iPhone 18 Pro Max at the same capacity, and it tops out at £3,199 and ₹4,49,900 for the 2TB version. iPhone Duo in…