Which is a significantly bigger investment. An extra phone is a permanent loss of the money that went into buying it, it requires maintenance (of a sort) and ne

Which is a significantly bigger investment. An extra phone is a permanent loss of the money that went into buying it, it requires maintenance (of a sort) and needs to be replaced on a regular basis since the payment apps will presumably continue to require relatively recent operating systems. It also requires a dedicated SIM card with associated cost. As a bonus, phones sometimes explode and set fire to things - when they're not busy getting hacked :)