Screen goes black with progress circle every 5 minutes or so.

So what streaming device are you using?

Connected directly to our router from Frontier, which worked perfectly before the switch from AT&T to DirecTV. Service is their top grade/fastest.

direct connection to the router for our main TV and the others have streaming built in.

We had no problems with TV service before the forced switch from AT&T Streaming to DirecTV Streaming. The only reason we got the new Visio was because the old Visio wasn't streaming and was starting to fail. BTW, I was at a company several years ago that was acquired by Samsung. They came in and laid us all off/shutting the doors on the company before the ink was even dry on the final contract. I will never buy a Samsung-branded product. This back-and-forth with you seriously makes me think we need to dump DirecTV as our streaming TV service. That's sad but I'm not seeing a lot of options because of the MANY drops in service. Can you see another option other than being forced to buy TVs from Samsung?

What streaming devices are you using? You want state? I keep asking and you want answer. 

Short answer is to keep what you have and get true streaming devices. Always use an external device. The devices are more powerful and support more apps. They also get more frequent updates. At some point the TV makers will just quit supporting these TV's. They rather sell newer ones. That is what their business is.

I have answered you many times. The TVs have built-in streaming so no need for additional devices and cost. Please note that there were NO ISSUES when the service was AT&T Streaming. These problems all surfaces only AFTER our service automatically switched to DirecTV Streaming.  You may believe you are being helpful, but this is just frustrating us both. This issues which MANY CUSTOMERS are experiencing needs to be addressed at the corporate level of AT&T/DirecTV.

Vizio app store does not have Directv Stream.  Are you casting Dtv stream from your phone or what? U aren't being clear how you are watching Dtv stream on your Vizio tv.

@Mazzda , we're just trying to help. But we can't help if you don't answer our questions. As stated, your TV brands do not have a DirecTV Stream App. So how are you viewing DirecTV Stream on those TVs? What streaming device are you using?  Roku? Firestick? 

I'm being as clear as I am able. We have Frontier who is(was?) in partnership with AT&T when we signed up for IP services. Frontier provides Internet and phone service then transferred me to AT&T to set up TV streaming. That was in June. We didn't experience any black/screen and buffering issues until after DirecTV took over from AT&T. Our IP service is wireless for web access and 2 of the TVs. The only wired connection is between our phone/lanline base unit and the router plus the 50" Visio TV to the router. That's it. No apps downloaded, etc. It's all about logging on one time at the beginning of the service through the online portable using the TV remote's on-screen keyboard feature. This logging on was performed with each TV.  Again, there were no issues when the serive was with AT&T Streaming.  The issues started after we were notified by DirecTV Steeaming that our TV service had transitioned to them.

It has nothing to do with your internet service provider. The question is simple .... What application/device are you using to view DirecTV Stream channels?  Only some Samsung models have the DirecTV Stream built-in, so you must be using some external device to view DirecTV Stream.

Just the Frontier wireless router - honest!

There's no way to view DirecTV Stream on a Frontier Router. That device just provides your internet connection. I don't understand why this seems to be such a hard question. What device is connected to your TV to view your DirecTV Stream channels? What remote control are you using?

Sounds like you're using Frontier's TV streaming service, not DirecTV Stream. There's no way to view DirecTV Stream in the way that you describe.  You wouldn't need to login to a Frontier account for DirecTV Stream. You would be logging into your DirecTV Stream account on the appropriate streaming device.  Sorry I can't be of further help. 

Thanks for trying!