5 steps to suicide:
1. After downloading and authorizing last OTA upgrade (battery initially
at 86%, USB plugged most of the time), next reboot went to TRWP (I've
forgotten to restore stock recovery).
2. Issue 1 solved, next OTA update issued unsuccesful upgrade message when system restarted.
3. After flashing just the 5 system.img sparsechunks via adb fastboot,
Nova Launcher came alive(!) and this time, opposite to step 2, system
settings assessed that the new LPI23.72-43 version was in place,
although Wifi refused to turn on.
4. To have my Wifi back, I decided to take the whole roundtrip and fastbooted all the files listed in flashfile.xml.
5. Now I have a hefty paper weight with no bootloader, that identifies
itself as "QHSUSB_BULK" when connected to a Win7 box and doesn't heat as
usual when plugged to a wall charger.
There must be something wrong with the *.img files; otherwise, gazillions wouldn't be wading through forums around the world in a quest for the unbricking formula.
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