Stallman protesting that
https://www.gnu.org/proprietary/malware-mobiles.html
Nonfree (proprietary) software is very often malware (designed to mistreat the user). Nonfree software is controlled by its developers, which puts them in a position of power over the users; that is the basic injustice. The developers and manufacturers often exercise that power to the detriment of the users they ought to serve.
This typically takes the form of malicious functionalities.
Nearly all mobile phones do two grievous wrongs to their users: tracking their movements, and listening to their conversations. This is why we call them “Stalin's dream”.
If you know of an example that ought to be in this page but isn't here, please write to <webmasters@gnu.org> to inform us. Please include the URL of a trustworthy reference or two to serve as specific substantiation.