Common problems & fixes
            Device not detected
            
        Try a different cable/port, ensure companion app is running, unlock device before connecting.
          
            Signature rejected
            
        Confirm the destination address and amount on-device; reject any request with unexpected details.
          Escalation steps
- Capture screenshots of errors and connection logs.
- Note device firmware and companion app versions.
- Contact official support channels with these details — never share the recovery seed.