A:AnswerI have not tried the AT&T however, the streaming and apps are seamless .... literally plugged everything in and was on Hulu,vudu, Disney +, and Netflix in about 10 minutes.
A:AnswerYou may want to check for system updates. Also, there is a system reboot option on my TV. I've had to do a few on my new Visio to get the SmartCast back. So, this could be a bad sign.
A:AnswerYou can get a RCA to Stereo Jack adapter that can allow you to do so.
They are available in 1/8" and 1/4" sizes - though the 1/4" will be much harder to find.
A:AnswerAsked and already answered above. Another person was able to purchase a center stand and it worked out wonderfully. Not sure if it was purchased from Best Buy.