This video shows how easy it is to eavesdrop on voice mails that are not protected by a password.
In the video they refer to software known as Asterisk which is used to spoof the caller ID. Asterisk and variants of it are freely available on the web so this is almost a zero effort tool for the hacker. Asterisk does of course have legitimate uses and in fact I use a variant of it on my home / office VOIP (Voice over IP) setup.
Now that you’ve seen how easy it is to hack the voice mail you should check our article “Protecting yourself from Cell phone hacks…” for more tips on protecting your cell phone from hackers.