Silent missed calls: Users unable to receive critical incoming calls despite active service

Smartphone users experience a systemic problem where incoming calls fail to ring or generate missed call notifications, causing them to miss important communications from clients, contacts, and emergencies. This occurs across multiple carriers, devices, and network conditions, and persists despite troubleshooting efforts. Current solutions (carrier support, device resets, switching providers) fail to resolve the issue, leaving users unable to reliably receive calls—a fundamental expectation of cellular service.