5g home internet - some sites won't load

LowKeyHiTech wrote:

It's an applied content filter from T-Mobile. You have to call and get it removed...

I have the same problem too. Some websites does not work when I use T-mob 5G but works on ATT Router.

So I ran into the same issue where even my LG smart TV would play any content even though it was connected to the internet.  Lowkeyhitech was correct that TMobile has a filter applied by default on some accounts (business ones usually) that block specific sites.  The solution is to call TMobile and have it removed, but it needs to be done with technical support because customer service won't know anything about it. 

I called T-mobile tech support and told them about the entry above that mentions the applied content filter. The tech talked to a supervisor and then told me they were not aware of any such thing existing. After much searching and reading articles I was convinced it was related to network security or encryption protocol. I attempted to update the driver for my network adapter, but it said it was up to date. However, Windows Update found 4 other updates that were available for my Windows 11 Pro system. One of them was a cumulative update for the dot NET versions. I ran the four updates and rebooted about 3 times during the installs. Then, my connection to all websites started working. If you can connect to Google, Youtube, and other popular websites, but cannot connect to others, like Walmart.com, try updating all your drivers and applying Windows updates. It worked for me. Good luck. 

Everything worked well for me for the 2 months, and now my internet is spotty and I'm having issues with chromium based browsers on my work Mac. If I use Safari web pages load just fine. If I use Chrome, Edge, or Arc (all chromium based) I get this error message:

“Your connection was interrupted.

A network change was detected.

ERR_NETWORK_CHANGED”

I've tried changing my DNS to the free Google ones. Renewed the DHCP Lease. Restarted my computer and T-Mobile modem/router. Connected to my work VPN. Nothing has worked so far. Every once in awhile I'll get a website to load once and then I get the error message again.

I don’t have this issue on my personal Mac.

I have the same issue on puppybear.tv I make money watching videos. it loads fine with Spectrum which I still have because when I cancel they gave me it for free for the next 2 years since the government program pays $30.

Problem just popped up for me today. A Web Site I manage won't load. Rebooting the router fixes it but then failure ensues. I'm suspicious that some legitimate cross web-site scripting is causing the problem because I use WordPress with tons of plug ins and the problem only starts when I try to update my content. I'll follow-up if can come to any conclusion.

I'm having the same problem. I develop Joomla websites, and the back end Administrator section of two of my websites refuses to load certain assets (CSS, Javascript, images). The issue comes and goes. It happens on every browser on every computer in our house… but outside our T-Mobile Home Internet wifi network, it loads reliably every time.

Try taking your gateway's wifi from "auto" to 2.4 GHz only.  This resolved the same issue for me.  For reasons I won't bore you with I was all set up from switching from the old original gateway to the new white 5G version so I could get an external antenna mounted on the roof.  I'm somewhat rural and setting my gateway outside was a game changer for BW to my address.  So upgrading to the new gateway was sort of a no brainer.  Anyway, having gone thru the issue of setting up some thermostats that don't use 5GHz wifi a week ago when I received the new gateway, when I started having issues loading websites today, such as costco.com for example, I remembered I had reset my gateway earlier today but forgot to set to 2.4 GHz only.  I did that, and voila, costco.com and other sites started working again.  Hope this helps someone else.  On the app, go to the "network" tab, and click on the SSID, and in the "update network" sub-menu, under "advanced settings", you have a pull down and can select between Auto, 2.4 GHz and 5 GHz.  Select 2.4 GHz.

Disregard my last on the 2.4 GHz connection.  Soon as I sent that, my connection went sideways again.  I'm going back to my old Nokia gateway from t-mobile.  I can't hook up an antenna, but at least I never had this issue with it.

Update. Disabling the Google Analytics and SEO plugging  on WordPress seems to have resolved my immediate problem. Root cause still undiagnosed.