New Delhi, Dec. 13 -- When he notices that I use a Xiaomi phone, Manu Kumar Jain, managing director, Xiaomi India, starts questioning me about the features I like and dislike. For the next 5 minutes, we discuss RAMs and megapixels and proximity sensors, along with problems I have faced with the MI cloud feature and its stubbornly uncooperative authentication process. Jain takes notes and offers solutions, and when I mention that my last four phones have been Redmis too-the price-to-quality ratio is tough to beat for someone who regularly loses or damages phones-Jain says a heartfelt "thank you", almost as if he's touched someone would pay to use his humble product.

It is anything but. Xiaomi now sells more phones in India than any other sm...