So: connect the phone via USB to your PC while it’s on, turn the phone off, hold volume-up, press the power button for a second, release volume-up. The phone should then show up in flashing mode in your dmesg/lsusb.
So: connect the phone via USB to your PC while it’s on, turn the phone off, hold volume-up, press the power button for a second, release volume-up. The phone should then show up in flashing mode in your dmesg/lsusb.