[masraum]

Originally Posted by stomachmonkey

The key will be how the carriers treat this.

If you have a consumer on a pre paid or time limited plan then the call can't count against their minutes.

If it does you're gonna have an issue because you've removed the consumers choice to answer or not and are effectively stealing from them.

There's no call to count against minutes. The only way it might is if calls to the user's voicemail to hear their messages count against their minutes.

I'm not in the cell phone business, but I am a network engineer, so I suspect I've got a pretty good handle on how this works.

Your voicemail is basically like audio email. If you don't answer the phone, callers can leave an email for you to retrieve at a later time on a server. That server has 2 ways to receive mail, one is via a call, but the other is via a network connection (exactly like email). Providers don't leave that route open to just anyone, but they are starting to set up that route for certain institutional users. Basically company A sends an audio message like an email straight to your mailbox via the Internet instead of using phone lines.