How to reset OTT TV BOX? I forgot my pin and tried entering it too many times, so I need to reset my OTT TV Box.

What are the key combinations do I hold 
on boot to reset the device?
If you are talking about the OTT M8 follow these instructions (Source):

(Click image to enlarge)


The reset button is located in the A/V port on the back of the device.
Using a jewelers screwdriver, place it in to the port until you feel a click
Hold the reset button down


Insert the power cord while continuing to hold the reset


Once you see the screen below, it is then safe to release the reset button