Chinese TV station, CCTV, has reported some cases where smartphone were compromised by pre-installed malware before selling them on to unwitting customers. Malware is called DataService, an insidious agent that interacts with other resident Android apps to steal mobile info, push ads and download the specific web content. Goohi company provides an android application pre-installation service using a product called Datang fairy artifact It is claimed that this device can automatically install every application it holds onto an Android mobile in just a few minutes. This menu of applications comes with a price tag of 10-50 US cents per installation.”]
Source: http://securityaffairs.co/wordpress/23591/malware/pre-installed-malware-on-android.html