ListenInTM lets you know why people are calling before you commit to taking their calls. Remember what it was like to eavesdrop on messages from your home answering machine? Now you can do it from any phone.
To listen in on someone's voicemail, press 2 and stay on the line. If it sounds important and you want to talk, just press * on your phone, and you're in.
Caroline is a Google Voice expert and author of this help page. Leave her feedback below about the page.