Power/Confirmbutton and keeping it pressed until the status led flashes green
Up Arrowbutton, then press and release the
Power/Confirmbutton (while keeping the Up Arrow still pressed).
Nexton the second dialog to trigger firmware upgrade request transaction for your device
chmod +777 PebbleUSBTools
Confirm/Powerbutton, then use a pin or a SIM card tool to press the hardware reset button (while you keep pressing the
Flash APP Firmware” button: