No coverage is something that happened. Flight mode is something you chose.
One local way back
A screenless cellular instrument needs a control that still works when the network and ordinary touch interface do not. V4.6 places a force-operated input beneath the lower endpoint of the existing uniform light line. The surface remains continuous; a short press reports state, a deliberate hold toggles flight mode and a longer protected hold shuts the instrument down.
The exact switch, force, travel and internal reaction structure are not selected. This is approved interaction and placement intent, not released hardware.
Four states, four meanings
Loss of coverage leaves the radios enabled and allows bounded reconnect. Flight mode disables LTE and Bluetooth until the person turns them back on locally. Privacy removes microphone and camera authority. Full shutdown ends ordinary operation. One state must never be used to imply another.
Flight mode also suspends Guardian’s Bluetooth separation and cellular alert paths. The local receipt will say so plainly. Nothing reconnects merely because the instrument restarts or believes a flight has ended.
The old evidence keeps its name
V4.6 keeps the 127.5 × 29 × 12 mm V4.5 exterior, camera, constellation and recessed USB-C direction. Existing V4.5 renders and CAD remain useful evidence for those inherited relationships, but they do not show or prove the new force mechanism.
Release still requires placed mechanical and electrical design, optical continuity, pocket and wet-hand testing, protected shutdown, measured LTE and Bluetooth silence, antenna and EMC evidence, and comprehension testing. The independently connected instrument remains in development.