Please have a good listen to this ABC News Clip. It talks about how people can hijack our mobile phones and use it to spy on our daily activities and listen in on our every conversation via simply downloading software into our mobile phones.
It also talks about the signs to look for that suggest our phones are bugged.
Please have a look and ignore at our peril.
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http://news.yahoo.com/video/tech-15749651/being-stalked-through-your-cell-phone-18511556