Imagine someone watching your every move, hearing everything you say and knowing where you are at every moment. If you have a cell phone, it could happen to you. 13 Investigates explains how your cell phone can be secretly hijacked and used against you - and how to protect yourself.

Here are Liz Pulliam Weston’s top sites for finding deals and freebies, the best advice for tackling financial problems and tools to make your life simpler and easier.