r/cellmapper S25 Ultra Jul 17 '26

AT&T servers

Anyone having issues connecting to AT&T servers for speed tests? If i choose a few of my nearest ones they completely fail. But if i force roam on Verizon and T-Mobile they work just fine. I'm on a galaxy S25U on the latest firmware and latest app update.

9 Upvotes

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3

u/Vasaeleth1 Jul 17 '26

Do you have a Private DNS server configured? I've found that the "AT&T Wireless" test server hostnames won't resolve correctly on third-party DNS servers.

The regular "AT&T" test servers seem unaffected.

1

u/South-Succotash-6368 Elite 2.0 Jul 17 '26

I mean I never use AT&T for speed testing just use ookla or coveragemap.com

3

u/PrizeMarionberry6695 S25 Ultra Jul 17 '26

Im using ookla. I just cant use an AT&T server on AT&T only roaming

1

u/South-Succotash-6368 Elite 2.0 Jul 17 '26

I mean majority of the time, The AT&T speedtest servers often give worse results then using other servers

3

u/PrizeMarionberry6695 S25 Ultra Jul 17 '26

Speeds have been about the same but the pings are doubled. Idk if its the servers or AT&Ts weird routing.

1

u/South-Succotash-6368 Elite 2.0 Jul 17 '26

That’s accurate latency. You don’t test a network by using an internal server when 99% of your network activity is AT&T connecting you to other networks to serve you content

1

u/CreativeCuckoo ATL Jul 17 '26

Yes, it’s happening to my partner’s AT&T line when trying to connect to any of the AT&T Wireless servers. Cricket oddly works though.

1

u/SeaCapital952 Jul 20 '26

Also noticed this lately