Well, the instructions (I’ve read the Spanish one because the english one does not have “Dual boot” instructions) are misleading.
They say that you need to press the volume+ and the power up together until the dual boot menu shows (The device must be turned off).
This is inaccurate. The power button needs to be pressed until the teclast logo shows, and then press the volume up button until the boot menu (in chinese) shows.
If you press the power and the volume up buttons together, then the device would never turn on.
