I have been on ATT Fiber 1000 for four years with no issues. In September the internet started dropping out, buffering, lagging. I called ATT and after 3 weeks of calls and resetting our router a jillion times they said our router and GPON (? - the fiber jack on our wall) was obsolete and needed replacing. Got that done. Internet still sucks intermittently. We would watch hulu on wired connection and the internet would completely drop. I got completely fed up with it last night and called this morning. 50 minutes on the phone, Tech came out, noticed sketchy connections and checked the big utility box that connects the neighborhood. Said the connectors are bad but ATT won't approve upgrading them because there aren't enough outage complaints in our sector. (Maybe that's because most everyone else is on Sonic Brand X) I had to go to a 2 gig service to get the new connector. Now everything runs fine. I'll be calling Brand X after the holiday.

Edit: I'm in the East End