Xiaomi has scheduled an event at the China National Convention Centre in Beijing on September 27. Running up to the launch, Xiaomi has released a teaser with a big S taking the spotlight, hinting that the much rumoured Xiaomi Mi 5s is finally set for a launch. The Xiaomi Mi 5s smartphone is expected to be the beefed-up version of the Xiaomi Mi 5 flagship smartphone. It has been leaked on various occasions revealing key features and specification details. The smartphone will feature upgraded specifications over the Mi 5, but the big talking point will be the Snapdragon 821 processor clocked at 2.4GHz. Just to compare, the Xiaomi Mi 5 is powered by a Snapdragon 820 chipset..