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70,000 ATT customers are without service across the US
(arstechnica.com)
This is a most excellent place for technology news and articles.
I'm not from the US, I only know AT&T from Last Week Tonight where John Oliver made fun of them many many times.
Actually now that I think about it, they're probably talking about it being unreliable in larger cities. I know I get much slower internet speed whenever I go to any larger cities due to network congestion.
But outside of major population areas they've been really good in my experience.
Last time I had anything less then 5G full bars was when I traveled across Europe to the middle of the desert in Portugal, to a festival of 40.000 people. The cell towers there weren't built for that many people.