Overview
The handset is where trust is won or lost
Verification that runs on the handset itself, helping carriers protect against SIM swap, support safer activation, and identify fraud signals during sign up.
A carrier decides who a customer is when a service is activated, and that decision is trusted every time the phone is used afterwards. Banks, government services and payment apps all lean on it, usually by sending a code to the number and treating whoever receives it as the customer.
That inheritance is the weakness. When a number moves to another device, whether through a swap arranged at a counter or a port that should never have been approved, the trust moves with it, and every service downstream keeps honouring a decision that is no longer true.
The checks below run on the device and confirm the person through their behaviour and appearance rather than relying only on a code that can be redirected, so the account stays attached to the customer rather than to whichever handset currently holds the number.