Stories of covert surveillance are not just the stuff of adventure movies.  There is more chance of you cell phone conversations being overheard than you may think.   The most common reason why your calls should be targeted by professional wiretapping is if you are discussing sensitive commercial matters that other could use to their advantage. Many businesses spy on each other in the manner of cold war government agencies. The spies listen in to gather industry secrets, business plans and any other useful information. With an encrypted cell phone you can talk in confidence to colleagues and clients - it is well worth the investment for improved security.