Description Update for Sim-Swap

### Describe the bug

1. Check whether the phone numbers are real or fake.
2. Update the description for sim-swap by adding a NOTE on how the verification is done.
3. Generate the phone numbers randomly for testing purposes.

### Attach any resources that can help us understand the issue.

- Search for the website to check and verify the phone numbers.
- Search for the website that generates random phone numbers.

Locate the Sim-Swap mock and the description or documentation it uses. Review how its phone numbers are currently represented and identify a suitable verification reference and test-data source. Done means the description includes the verification NOTE and the test numbers are updated as requested.

Written by the indexing model from the issue text.