Fire TV's won't connect to Home Internet

Yep I'm having the same problem. My fire stix will connect to all phones or  Wi-Fi but not my TMobile internet 

So the Fire TV network adapter specifications might be helpful to know. Are those wireless adapters 802.11ax/WIFI6 or ??? So, a month ago. Did the gateway take an upgrade that you are aware of? Which T-Mobile 5G gateway do you have?

You got them to connect to your phone's hotspot wireless so what specification is that? I would start with determining what worked at least for getting them connected and see if there is a significant difference between that and what is done on the same wireless frequency on the gateway. It might be the authentication type. 

What are the network adapter specifications? I'm not sure what you mean by that. I'm also not sure about the gateway having an update but I assume so because I have also had trouble on Disney Plus and Paramount Plus (on my roku) where out of nowhere, it will throw up an error saying that I'm using a VPN and they don't allow that and then the apps won't work untill I restart. So I'm assuming there was some kind of update that is causing these issues. I'm not sure what you mean by what specifications my hit spot is either- it's just the Hotspot from my tmobile phone. I agree that it has something to do with authentication because of the issue with my roku apps. 

By the network adapter specifications I am referring to the version of wireless standard it operates by. The model(s) of the two Insignia Fire TV's with a search online for the specifications for them should provide the information. Since they are Insignia they are from Bestbuy I am guessing so that might be a place to start. 

Say the Fire TVs are new, new and support WIFI-6 (802.11ax) then they have the same radio technology as the gateway. If they are a few years old then they may only support WIFI-5 (802.11ac). They should still play pretty well if that is the case. If they are older and only support a prior version of wireless technology/standard then it might be a little more challenge.

If you have an older wireless router there that you had them connected to before the T-Mobile gateway and they connect to it then you could connect it to the newer gateway and build a workaround. If you have a range extender that will link to the gateway and they connect to it then that might be another option. The best option is to get them to talk to the gateway direct on the best radio frequency possible.

So, knowing how the TV communicates on the wireless network is necessary to know to provide a better more accurate suggestion.

So, I know I have seen other posts about Roku so I did a search. The title of the post is Fixed It so does not refer to Roku in the title but: (same issue with Roku or not? I do not know.)

Note: I am not saying this has anything to do with the Fire TV issue.

"I finally stumbled on a solution when I searched the internet using a different question. It's the Roku remote that caused this. The remote works off Wi-Fi and on the same channel as the Roku box and it continues to send signals even if you're not pressing the buttons. Maybe that combination was pulling too much signal, I don't really know why it fixed it. Once I download the Roku remote app y disabled the regular remote by removing the batteries, it started working. Just make sure the remote app is on the same Wi-Fi network as the Roku unit.

The speed is stellar and I'm not getting thrown out of programs or freezing or any of the issues I was having and everything is working great. My sister, who lives a couple doors away, was having the same problems, on two TV's and she did the same thing and now her Roku's are running great. One of her Roku models is a bit older than the Premiere+.

I'm so happy to put this problem behind me and I hope this can help someone else having these issues. Heads up to Roku if you're reading this, please post this solution in your forum. It might save some people a lot of aggravation."

Regarding Gateway firmware revisions: (firmware updates) visit the page for info

https://www.t-mobile.com/support/devices/firmware-updates--t-mobile-home-internet

Firmware del gateway

• Las actualizaciones de firmware se envían automáticamente cuando están disponibles. No se pueden solicitar manualmente.
• Se envían en etapas durante algunas semanas, de modo que no todos los usuarios reciben la actualización al mismo tiempo.
• Las actualizaciones tienen lugar de 1 a.m. a 3 a.m. PST; asegúrate de que el gateway esté encendida durante ese horario para recibir la actualización.
• No reinicies el gateway mientras se está actualizando. El gateway se reiniciará automáticamente cuando finalice la actualización.

Verifica la versión de firmware

1. From the T-Mobile Internet App, select MÁS > Información del Gateway.
2. Revisa el Firmware version.

NOTA: I have no idea when the last firmware push went out for the Arcadyan or Sagemcon.

For the Insignia Fire TVs I suggest the Bestbuy Forum:

https://forums.bestbuy.com/t5/Televisions-Home-Theater/My-Insignia-Smart-TV-wont-connect-to-WiFI/td-p/1218840

iTinkeralot wrote:

By the network adapter specifications I am referring to the version of wireless standard it operates by. 

So, I looked them up and couldnt find anything about network adapter specifications or wireless version standards. They are only a year old and were working with my tmobile home internet prior to last month. I haven't switched out or changed anything. I am using tmobiles grey cylinder gateway and it's the same one I had months ago. I am currently trying to find my router to try hooking that up next.

Also, I can't link the app to the tv's because the TV won't connect to the internet so the app cannot see it. 

If the app is like the Harmony remote app or the FireTV app I use it will communicate over the local network to the device. Just like the T-Mobile home internet app does.