How we HACKED mobile voicemail without a PIN • The Register

Following a previous guest post on how personal rather than default PIN numbers could be accessed, here’s a recent piece from the Register which explains continuing loopholes in mobile telephone services, which allow hacking voicemails through spoofing the caller’s number.

It’s believed the infiltrated inboxes merely had default PINs, or passcodes that were far too easy to guess, allowing eavesdroppers to easily drop by. People were urged to change their number codes for their voicemail, but, as we shall see, that advice is useless – you simply don’t need to know a PIN to listen to someone’s messages.

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