That was ATT. It (and all the other exposed operations) hardly support the statement that "all telecom companies and very likely all major tech companies are spying for the US government".
The US defense and intelligence apparatuses have been deeply intertwined with private enterprise for many decades. This is a matter of historical fact. But I totally understand if it's more comfortable for you to believe that now things are different despite the fact that no one was ever held to account for what happened in the past.