@AppLee I had suggested one time to have some clear instructions in the UT installer, right before flashing the image on the phone, something like:
if you have a functional Android phone on which you want to install UT, please do the following tests before proceeding, just to check that your USB cable and phone are ok from the hardware point of view, like:- connect your Android phone to a PC and see if you can transfer files back and forth; if ok, use that cable.
- check your SIM, calling, volume buttons, Wifi, Bluetooth, notification LED, etc. whatever hardware functionality you might think;
In this way, if someone bought a refurbished Android phone, they can do a hardware healthy check and not jump directly to the flashing step.
I know from my case that I didn't bother to do these tests. Luckily, I only had some problems with the USB cable.
Hope someone out there is listening, otherwise we'll meet these situations still.