Old news.....
Cell phones can run standardized code such as java... even if it was strictly proprietary code... You have a microphone, a digital transport....
it's not just the government that can activate the microphone.
The right skills and private citizens can not only eavesdrop on you they could:
1. Activate your microphone and port the audio to a phone of their choice for listening.
2. Track your GPS coordinates.
3. Turn on the 'SPEAKER' and speak to you.
4. Change your ring tone to a recorded message that they uploaded to your phone.
5. Etc.
It's a flexible platform, it's limitless and the cell providers don't give a fuck about security.