RIFF JTAG – HTC One M8 ULCA (AT&T) Boot repair supported

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Repairing bricked HTC One M8Ulca (0P6B12000) via ISP connection is easy with the RIFF Box.
Additionally to HBOOT and Radio zones, the zone which contains Model ID is re-flashed too. Thus after resurrection phone will have Model ID = ‘0P6B12000’.

To resurrect HTC One M8Ulca (0P6B12000) via ISP connection:

  • Get access to HTC One M8Ulca (0P6B12000) board (PCB);
  • Check schematics picture for solder positions of CLK, DAT0, CMD and GND signals;
  • Remove (de-solder) the CLK resistor;
  • Solder CLK, DAT0, CMD and GND wires to the specified pads on the PCB;
  • Attach battery
  • Connect USB Data cable;
  • Make sure HTC One M8Ulca (0P6B12000) ISP is selected in the list of models;
  • Click Resurrect button;
  • Wait till software signals a successful operation completion;
  • Disconnect USB cable and battery, de-solder wires and solder back the CLK resistor;

Now phone is in bootable condition, that is, even if it does not start up normally you can flash it using known flashing methods.
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