The Redmi K20 and K20 Pro will arrive in India on July 15 (and they'll keep their names). To build anticipation, Xiaomi's promo campaign starts as it did last year - by trolling OnePlus. Remember the "Do the ma+h" gift bags with a calculator? This year it's about numbers too, specifically the AnTuTu score. A few days ago the @RedmiIndia account tweeted "Somebody jus+ announced the world's fastest phone" (the "+" instead of "t" makes it clear who is the target of this dig). The company also promised to beat that, saying "hold my AnTuTu". And today Redmi delivers the second punch - Redmi K20...