Can't set up Chromecast - Resolved A little background first - I had a previous Netgear dual band router when I first bought the Chromecast device and all I basically had to do was plug it in, run the Chromecast install/setup program and follow a few prompts.

Connect your TV and mobile device to the same home Wi-Fi network. Open the AT&T TV app on your mobile device. Select the show you want to watch. Tap the home screen and then the Cast icon. Choose the TV or device you want to cast to. Get detailed info on how to set up your Chromecast device or TV with Chromecast built-in. Google Home App Can't Find Chromecast? Solutions You Must Try Fix: Can’t Find Chromecast in the Google Home app Before we jump right into the solutions, you might want to make sure that you’re facing the exact same problem which this guide is designed for. If you’re trying to connect your chromecast devices to the Google Home app and are unable to find or see the devices, then you can go ahead and AT&T TV using Chromecast | AT&T Community Forums Aug 05, 2018

I can't get Netflix to work on my Chromecast.

3 Ways You Can Use a VPN With Chromecast – Updated 2020

Problems using Chromecast with iPhone or iPad – SUPPORT

Once the Chromecast says it can't access the internet, it should begin broadcasting it's "setup" wifi network again. Open the setup app on an Android or iOS device (Android is the best option) and try convincing it to reconnect to your OWN network. 22 Things You Didn't Know Your Chromecast Could Do