An anonymous reader writes: Security researchers from G DATA have published research (PDF) into Android phones produced in China, which found that a large number of devices ship with pre-installed malware and spyware. Affected models include the Xiaomi MI3, Huawei G510, Lenovo S860, Alps A24, Alps 809T, Alps H9001, Alps 2206, Alps PrimuxZeta, Alps N3, Alps ZP100, Alps 709, Alps GQ2002, Alps N9389, Android P8, ConCorde SmartPhone6500, DJC touchtalk, ITOUCH, NoName S806i, SESONN N9500, SESONN P8, Xido X1111, Star N9500, Star N8000 and IceFox Razor. The researchers do not believe the manufacturers are responsible for the malware; rather, they suspect middlemen within distribution channels. "According to G DATA, the contamination of these smartphones is done by hiding malware as add-on code in legitimate apps. Since users don't usually interact with the malware and the add-on runs in the app's background, unless using a mobile antivirus solution, these infections are rarely discovered."