1. I updated to firmware V0.1.6. (It is working well)
2. However, I wanted to restore the firmware because password with code pin.
3. I went through the recovery process with the saved.dfu backed up from the previous upgrade.
4. After recovery, an upgrade fail occurred.
5. After that, the firmware cannot be upgraded.
6. XQ-50 Pro boots in DFU mode even after Power Off->On. (always)
How can I recover the XQ-50 Pro?