After Xiaomi released two AMOLED products last month, the tech company’s affiliate under MiOT Ecosystem Black Shark announced its gaming smartphone 4S—also featuring an AMOLED screen—on October 11. The next day, Huami (Xiaomi’s wearable affiliate) launched three AMOLED products. Black Shark’s AMOLED Smartphone Launched on Oct. 13 At 15:00 of October 13, the gaming phone maker officially launched its 4S series. The 4S features a Qualcomm® SnapdragonTM 870 processor, 6.67-inch AMOLED flat screen...