Yes, I am aware of toll free numbers and the like. The phone number analogy is not quite suitable as a counterargument against internet.org, but it was not meant to be one either. It was more a conter to the devil's advocate line of questions.

The tariff and regulatory structure of telephony is different from internet access. "Telephony Neutrality" basically says that you can call anybody you like as long as you can afford it and you are free to receive phone calls from anybody.

Internet.org is thus more like: "you can call these toll free numbers, but you cannot receive calls from anybody we haven't preapproved".