Home Internet IP address madness.

Anyone having this issue may want to consider investing in your own wifi router. Once you configure your wifi settings on the router you own, you can keep your settings the same no matter what internet service you get. Even TMobile home internet gateway allows you to connect your own router.

The only minor issue is that you can't disable the DHCP function yet on TMobile gateways. Yes it will add 1-3 ms of ping lag, but TMobile ping in general is high anyway so it's negligible. There are also some specific devices and/or apps that may not work if you have more than one DHCP layer.

I'm optimistic that TMobile with add bridge mode to disable DHCP. It makes more economical sense for them to do that rather than keep getting support calls on their woefully bad built in wifi on their gateway. They can let 3rd party router makers take the burden of wifi support issues.

Personally, I have a philosophy that goes like this. I value every service and utility that comes to my house, but that doesn't mean I want you inside my house like family. If I use an internet provider's device as my router, that router will know every single device I have on my network and respective network traffic. This means the internet provider may be collecting this data for legal purposes. If I use my own router and set my own DHCP, my router's firewall will prevent my internet provider from having this information. This also allows me to swap gateway devices from any internet provider without having to change my home network settings.