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If you have an Android phone like the Micromax Canvas Knight 2, you can use Miracast to wirelessly display your screen.  If you want to wirelessly display to the Vizio M-Series 4K Ultra HD Smart TV however, you need to add another device like the Roku 4 which support Miracast since Miracast is not natively supported on this TV.  Another advantage of adding the Roku 4 to the Vizio TV is that Roku 4 supports 4K allowing you to also find and stream 4K content to your Vizio.

When connecting the Roku 4 to the Vizio, make sure you use Vizio's HDMI 2.0 port labeled as HDMI 4K@60Hz.  Note that Miracast itself does not support HDMI 4K resolutions but you can still take advantage of Roku 4's other search 4K content search capabilities

First go to the Roku System page to enter Screen mirroring, and select Enable screen mirroring.

Next go to Settings on the Micromax by swiping down your finger from the top of the screen, and select the Cast Screen icon.  In the Cast screen display, you should then see the Roku 4.  Select the Roku 4 to begin the wireless display connection process.

 

You in no time see your Micromax's screen show up on the Vizio TV.