A:Answer I figured out how to get WiFi to work if you are still having issues. There is a question whether these units were meant to be sold or kept for displays but there is a way around it.
On your box, there should be a QR code or you can use this URL: www.tcl.com/RAY-DANZ/wifi-setup. It gives you instructions on how to connect wirelessly. After doing this and seeing the green light, we waited I think about 3 hours and the unit showed a message on the bar that prompted us to update. I pressed play/ok on the remote that came with the soundbar and then it read UPG 1 and went to 100. Then it installed the update and flashed Hello for a while then after it appeared to be on, I opened the Google Home app and it prompted at the top to finally connect to the Alto 9+. If you are using a dual band router, make sure you are connected to the same band on your device as the one you selected when setting up the bar earlier.
I hope this helps.!