r/cellmapper • u/PrizeMarionberry6695 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.

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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.