The only solution? If you really want privacy, take the battery out of your cell phone when you are not using it. Or, better yet, just for grins, do this:
1) Buy a can of "foghorn in a can", you know, the thing you use at football games.
2) At random times, or when you feel like it, blast it directly into the microphone of your cell phone.
3) If the FBI is spying on you, then someone may get a ruptured eardrum. If not, then people will just think you are a little nuts.
So much at my attempt at being funny. But seriously, what business is it of the FBI to listen in on your private conversations through your cell phone? I know, I know, some of you will say "If you are not doing anything wrong, you have nothing to worry about". Bull$hit - My private life is none of their fricking business. That is one of the reasons I do not own a cell phone, and never will.
Article is here.