Cell Phone answering machine

A simple idea, already baked in few cell phones (especially those with a symbian OS) Have a software on the cell phone, that will pick up your calls after a predetermined number of calls and record a voice mail. The one simple advantage of this is that. - since the voice mail is recorded and stored on your cell phone, you wouldn't have to waste your minutes dialing your voicemail box number and going through all the various prompts to retrieve them. Various other advantages do surface. - Some service providers charge additional for voicemail facilities. - Most voice mail boxes have limited capacity, storing them on your cell makes this virtually unlimited (limited by the space of your cell's memory) - Faster accessing your voicemails. - Can access voicemails when on flight/other places with no signal. - Can program the software to let pre selected numbers to directly go to the voicemail. (remember that annoying boss of yours?) As i said this idea is already baked and there were few softwares which already did that. My idea is to have all phone manufactures put this as a pre installed feature.