esto da en el proceso de la instalacion de el boot.img
List of devices attached
If your device is not listed exit this program now, enable usb debugging and try
again.
Presione una tecla para continuar . . .
error: device not found
error: device not found
Please accept superuser request on your phone
error: device not found
Presione una tecla para continuar . . .
error: device not found
error: device not found
Bootloader should be flashed to your device now, backup from old bootloader is s
aved at /sdcard/backup.img
Presione una tecla para continuar . . .
presiono la tecla y se sale