In that case I don't really understand your point. There are lots of ways to send messages other than through Apple's visual voicemail if you want to set them up. Yes it's true that you can have Google Voice handle your voicemail for you if you go through a set of steps to set it up.<p>I don't own an iphone, but I imagine there is a native email application that Apple wrote. Let's say you have mac mail, and are popping your mail to your phone. I also imagine there are plenty of other email clients, which notably Apple has not rejected. If you then download and configure one of these other clients to pop your email is that duplicating a native function of the phone? Is it confusing? I argue no, and apparently Apple agrees since said apps certainly exist in the App Store.<p>Choosing to consume your data in a way other than Apple intended seems to be the problem with Google Voice. The argument of confusion by duplicating functionality is patronizing to users and pretty thin.