Download messenger for ZTE Phones. Download messenger for ZTE Grand S Flex, Grand Memo, Blade C2, Grand X M, ZTE Open, Grand X Pro, Blade Apex, ZTE Skate, ZTE Open … Download messenger for ZTE phones. ZTE is a Chinese multinational telecommunications equipment and systems company based in Shenzhen, China. ZTE Corporation is the #5 ( was fourth in 2012) largest mobile phone maker in the world according to unit sales (3,3%), after Samsung (30,3%), Apple (19,1%), Huawei (4%) and LG (3,8%).