Hi, I bought an M.2 drive but I can't find the screws in the mobo box, so I need to buy new screws but I have no idea what size I need. Does anyone know the screw size? Also, do I need a standoff?

I own an RT-AC87U Router, which works great most of the times. However, we have 4 android devices in our family that has problems connecting to the wi-fi. Most of the times the phones will not connect to the router, saying the wi-fi password is incor...