Offer plans like that, I don’t think they are very popular. I don’t believe any prepaid plan does that, as people would get them too much for incoming-only phones. Since that forces you into a monthly subscription carrier, there to get free incoming you have to make some sacrifice because one way or another you are paying for the incoming calls — there is no way to charge the caller for them as is done in Europe etc. All they do is create an illusion that the incoming calls are free by charging more in monthly fees or for outgoing calls.