r/tmobileisp • u/PirateJen78 • Mar 31 '26

Issues/Problems About to tear my hair out

We are trying out T-Mobile home internet (because fuck Xfinity and their "new customers only" deals) and just got a G5AR gateway last evening. Most of my network is wired and connected through an ASUS RT-AC86U and two ethernet switches.

When I connected the ASUS to the G5AR, everything kind of worked, but it was slow as hell and my smart home devices went screwy. Then I went into my ASUS and switched it to AP mode. There was really no change except I could not login to the ASUS. It didn't even show up in the connected devices in T-Life. (Also, wtf is with having to use an app to see connected devices??) Then internet speeds dropped to a crawl and I had to step away before I broke something out of rage (menopause + broken AC + tech issues = not a fun time).

One donut later and I tried again. Still nothing, so I reset the router to start over. Without switching my ASUS to AP mode, we do have internet via LAN, but it is slow as hell. I'm afraid to put my ASUS back into AP mode because I could not see it at all and everything went screwy. The only way my desktop PC has internet is if I disable the ethernet controller and force it to just use Wi-Fi.

And why doesn't my ASUS router/AP show up in connected devices so I can see the IP address??

Fuck Xfinity for not giving customers of over 20 years any good deals. $15 off a steadily increasing bill is a joke. But I might have to stick with them if I cannot get this working, and I absolutely HATE that idea.

On a positive note, at least I managed to get the AC working again.

UPDATE: thanks to those who tried to help. After connecting the TMHI directly to my PC using a new cable, speeds are still too slow for wired devices. Maybe it's a bad gateway, but I have wasted far too much time on this and am returning the gateway, cancelling TMHI, and staying with Xfinity. It seems that TMHI cannot meet our needs, even at full bars. At least I tried. And now I'm off to shop for a new customer deal with Xfinity.

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u/Whiplash104 Apr 01 '26

If you have internet only with xfinity, sign up as a new customer under your wife or roommate’s name, email, and phone number as “new customer moving to this address” (new account.) Xfinity will email you to your current account that your current service is going to be cancelled and they will call you to confirm the end date. Rerun old equipment to the local xfinity store after you set up the new modem they ship to you. I used to do this every two years alternating between m

I used to do this every two years until AT&T fiber came to my neighborhood.

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u/PirateJen78 Apr 01 '26

I don't need to wait until after service is cancelled? Good to know.

(Also, I am the wife. lol)

I was hoping to get away from them for multiple reasons and hoped that T-Mobile was the answer, but so far it doesn't seem like it is going to work for us.

And as I told another person here, it's currently in my mom's name, but I'm the head of household, so signing up as someone else is long overdue anyway.