I have two XT09-SI OEM units ( purchased from here:
They are now totally non-responsive, and from all outward appearances, “bricked”.
I am in Australia, I used X-CTU tochange the firmware to support “Australian” frequency-hopping mode, which should consist of pressing the “Read” button, change “function set” in drop-down, and then pressing the “write” button.
When doing that, it performed the read perfectly, and I got a “flash error” when writing the result, and I can no longer communicate with the device at all.
Is there a way to “unbrick” these devices, and return them to “factory default”?