MSNBC - Cell phone voicemail easily hacked

MSNBC - Cell phone voicemail easily hacked: "But Eagan discovered that services use caller ID to authenticate the cell phone, and months ago, hackers learned how to spoof, or 'trick' the caller ID system. Using such a service, a hacker can dial the mobile account holder's telephone system and immediately access their voice mail and other services.

Essentially, knowing someone's cell phone number is enough to gain access to their voice mail and all their administrative tools."