Note that you can still downgrade an existing gateway, extract certs[0], then bypass the device [1]. I had to do this with OPNsense to avoid the latency buildup issue, which has been ongoing for months[2].

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0 -- https://www.dupuis.xyz/bgw210-700-root-and-certs/

1 -- https://github.com/MonkWho/pfatt

2 -- https://www.reddit.com/r/ATTFiber/comments/1eqfouo/psa_att_n...