Accept the route. Keep the evidence.

Carrier completion and useful caller reachability need separate acceptance records.

First distinguish a call that never reaches the platform from one that reaches it but does not ring the intended person.

Different originating networks can expose a routing issue that an in-platform call never exercises.

Investigate device, notification and connection conditions before assuming a completed port must be repeated.

A connected call with poor audio is a different problem from a number that cannot be reached.

Reconcile the number count while keeping provider status and caller-journey evidence distinct.

Check whether a message exists before concluding that voicemail itself failed.

A usable handover transfers authorised responsibility, not just a login or a diagram.

Coordinate the new provider’s transfer process before closing the account that still serves the number.

Compare the original requirements with observed reachability and operating work before declaring the move successful.