T-mobile gateway with seperate router
I'm just starting out on T-Mobile home internet but didn't want to stop using my Asus Router which is set up nicely already to handle everything in this household (both wifi and ethernet). Here's what I did to avoid any problems. I hooked my Router's WAN port (which use to go to my cable modem) to one of the two ethernet ports on the back of the T-Mobile Gateway. To avoid double NAT and other problems, I went to Administration on my Asus RT-AX82U and changed it from Wireless Router to Access Point. I made sure to download the Device Discovery Utility linked under Access Point before saving the change so I could get the Router IP address to log into it after the Router reboots. Then just type the new IP into the browser to continue managing the Router. I hope this helps anyone that simply wants to keep using their Router and it's setup with the T-Mobile Gateway. I can't totally disable the wifi in the T-Mobile Gateway (mine is the Sagemcom), but I switched it to 5Ghz only in the Tmobile app to cut down on any interference (which hasn't been a problem anyway) and still only use the WiFi from my Asus Router.
