A:AnswerConnect your DirecTV box to the TV using an HDMI cable.
Try the Power On feature, when enabled, the TV turns on displaying the last used input. To activate it, go Home > Settings > Display & Sounds > Power On and select Last Input.
A:AnswerUnfortunately, the Xfinity is not available for download.
You need to connect a Cable Box using an HDMI cable to watch Xfinity channels.
With this TV you can stream Netflix and Prime Video.
A:AnswerNo, this TV does not support direct casting nor mircast nor screen mirroring.
You need to connect an external Chromecast device for Android or Apple TV box for iOS.
David M. - Toshiba Support