[afinlayson]

I don't get why we are still using Integers to do phone calls. We could solve this with either a little bit of cooperation with Google + Apple or government stepping in

[Gunax]

What about backward compatibility with traditional phones?

[jazzyjackson]

You would prefer floats?

(I kid, I am also puzzled that there is apparently no way for a network to verify a caller is a subscriber and not someone leasing VoIP numbers)

[DoctorOW]

All you need is boolean. It either is or isn't the phone you wanted to call. :)