[spam] [personal] information on the Unihertz Titan, a mobile phone

[k]

-> USB Debugging only works if the USB connection is changed from
charging mode.  Even though the interface incorrectly says it is
active.

The TWRP source code readme has information on using fastboot:

1. Allow OEM unlocking in Android developer settings (if you don't know what it
 is, search on the internet)
2. Boot to fastboot: power off the device, press VOL UP + POWER,
you'll get into recovery, select "boot into bootloader". If you see
"no command" screen, press VOL UP + POWER simultaneously multiple
times, you'll eventually see the menu.
3. (skip this step if you already have unlocked bootloader) On the PC:
fastboot flashing unlock