https://www.androidauthority.com/xiaomi-mi-4s-specs-price-release-date-676185/
Snapdragon 808 powered Xiaomi Mi 4s announced in China
Feb 24, 2016 - Xiaomi has unveiled its new Mi 4s smartphone at a launch event in Beijing, which features a Snapdragon 808 processor, 13MP camera and 64GB of storage.
xiaomi mi 4ssnapdragon 808poweredannouncedchina
https://www.ubergizmo.com/products/lang/en_us/devices/xiaomi-mi-4s,xiaomi-mi-4c/
Xiaomi Mi 4s vs. Xiaomi MI 4c Specs & Speed
Xiaomi Mi 4s, Xiaomi MI 4c: Technical Specifications and Speed/Benchmarks comparison (Camera, Processor, Memory size, Price and Features)
xiaomi mi 4svs4cspecsspeed