Cell phone "interceptors", special modified cell towers, [ can take over a phone through the back door ]( http://www.popsci.com/article/technology/mysterious-phony-cell-towers-could-be-intercepting-your-calls ) in the baseband processor.
Ссылка: https://stallman.org/archives/2014-jul-oct.html#06_September_2014_%28Cell_phone_interceptors%29