The developer of the open source operating system Replicant OS, Paul Kocialkowski has uncovered a backdoor pre-installed on Samsung Galaxy devices and the Nexus S that allows remote access to all the data in the device. The backdoor runs in the background in the communications processor and allows the modem component to remotely the users storage. The spying can involve activating the device’s microphone, but it could also use the precise GPS location of the device and access the camera, as well as the user data stored on the phone.”]
Source: https://securityaffairs.co/wordpress/23023/hacking/samsung-galaxy-backdoor.html