Overview
Firmware failures may be environmental (low battery, RF dropouts, app put in the background mid-update), version mismatch (wrong hardware revision), or app or OS interference. Use a disciplined retry policy.
First-line actions
- Record current and target firmware, model, hardware version (V4 or V5+), error text, and time.
- Charge both device and phone; retry once after restarting Navigator Mobile in a low-interference area.
- Keep the phone on with Navigator Mobile open for the entire update — backgrounding the app is the most common cause of update failure.
- Confirm the image and device targeting are correct for the hardware revision.
- If two careful attempts fail, follow Recover from a Failed Firmware Update for the documented in-app recovery flow.