Portout Pin is VM Password - VM PW is last 4 of # (Score 3)

Tracfone's port out pin is the VM password. By default the VM PW is the last 4 digits of the phone number. Even if the VM pin is set to a custom value, unless the customer specifically enables the option to "always ask for password" - an attacker can just spoof his caller ID to match the target phone number and he will be dropped right into the voicemail system where he can than - change the VM and thus the Port Out Pin. ....the more you know