[chenxiaolong]

It's probably worth pointing out that the online process is one time and it installs a token that permanently lets the setting be toggled offline afterwards. This persists across factory resets and flashing any OS.

I wrote more details about it works under the hood here: https://news.ycombinator.com/item?id=35856171

[Aachen]

Epic level comment! Very interesting to read about in this technical detail, thanks for taking the time to write it up.