There's a scary new trend taking place: Cell phone cyber-stalking. That's basically when someone tracks your whereabouts via your cell phone GPS signal, but it doesn't stop there. According to ABC News, spyware can be downloaded onto just about any cell phone, and it lets someone listen in on your phone calls, read your text messages, and turn your phone into a listening device, so they can hear everything you say. It can even be done remotely. One woman mentioned in the ABC article was stalked and terrorized by her ex for three years. She couldn't figure out how he always seemed to know where she was, who she was with, and what she was doing. She changed her cell phone number 10 times - and he'd be calling her new number within minutes. It turned out he had installed spyware on her phone, and the problem didn't stop until she bought a new one. Security expert Robert Siciliano says he gets a lot of emails from victims of cell phone spying. He says it's not illegal to buy stalking software, and it's not illegal to use it either - because most stalking laws deal only with physical stalking - not the electronic kind. Plus, we've told you many times how parents are installing tracking software on their kids' phones. So, how can you protect yourself? Know this: Spyware can be installed in just a few minutes - so, be careful who has access to your phone, and watch for signs that there's stalking software on your cell: For example, the screen lights up for no reason. Or the flash on the camera goes off when you're not taking a picture. There could be spyware on your cell phone if you hear background noise when you're on a call - and neither of you is someplace noisy. You repeatedly get mysterious text messages from numbers you don't recognize. If you think there's spyware on your phone, call your cell phone provider to help you reinstall your phone's original operating system. If that doesn't fix the problem, get a new phone, and ask your cell service provider to help you install anti-spyware software. If you'd like to go further, visit the Stalking Resource Center at the National Center for Victims of Crime at NCVC.org.