Connect the smaller end of the MHL cable to the MHL Phone device.
Connect the larger end (HDMI) end of the MHL cable to the HDMI input on the TV that supports MHL.
Connect the USB Cable end to Power source USB Plug / TV USB PORT / POWER BANK etc.Turn both of the devices on.
From the menu of the TV, set Auto Input Change (MHL) to On so that the TV automatically switches to the MHL input when an MHL compatible device is connected.