Using this free screen mirroring tool, LetsView, you can easily mirror Android or iPhone screens to Windows or cast PC screens to your Phone. This program is not 100 percent straightforward ...

To connect to your TV, open the Home app on your mobile device and select the Chromecast device you want to use. At the bottom of the screen you'll see a button labeled Cast my screen -- tap it.

You can stream from a PC to your Fire TV Stick ... it doesn’t allow you to cast your phone screen to the Fire TV.

Access the quick settings panel by swiping down from the top of your Android phone or tablet's display. There should be an option labeled Screen cast. If you can't find it, use the Smart View ...