> What's needed is a carrier offering which allows you to have a small phone on an account in addition to a big one, at no extra charge. Both ring on the same n

> What's needed is a carrier offering which allows you to have a small phone on an account in addition to a big one, at no extra charge. Both ring on the same number, and you can't have independent calls on both at the same time, and there's some limitation to prevent using both for major data at the same time. Why would a carrier offer for free something they can easily monetize? A proxy for this would be how Verizon charges customers a monthly fee for the "soft" sim present in Apple watches.