(170510) -- NAIROBI, May 10, 2017(Xinhua) -- Photo taken on May 9, 2017 shows an outdoor advertisement of Tecno Mobile in downtown Nairobi, capital of Kenya, May 9, 2017. Chinese mobile phone manufacturer Tecno Mobile sales reached 25 million devices, including 9 million smartphones in 2015, helping it to sustain the most "popular" brand status in Africa. (Xinhua/Sun Ruibo)
