Our responsibility is national public safety. That means hundreds of thousands of devices operating far beyond the walls of any building — vehicles, mobile data terminals, handheld units, and field equipment spread across an entire country, connecting over cellular networks we do not own. Traditional network security assumes a perimeter you can defend. We do not have one perimeter; we have 350,000 of them, and every single one is mission-critical. A security failure for us is not measured in money. It is measured in public safety. APNZone is the first platform we have seen that treats cellular connectivity as part of the Zero Trust architecture rather than an exception to it. Every field device connects through a private APN — it never touches the public internet, and it is effectively invisible to anyone outside our network. SIM-based identity is fused with network access control, so a device is authenticated and its policy is enforced before it can reach any operational system. If a device is lost, stolen, or behaves abnormally, it is isolated centrally and instantly — across the entire country, from one console. We have run this at a scale of more than 350,000 endpoints. At that scale, most products break, and most vendors disappear. APNZone did neither. For an organization where connectivity is operational capability, S3M turned our largest attack surface into our most controlled asset.