@ChromiumOS-Guy said
@oldbutndy not really it would help a lot yes but you can use standard reverse engneering software to check it, also engneering roms have unlocked bootloader so you just compare that to the oldest release if an engneering rom exists.
I actually spent more time looking into this yesterday. I did sequential question search using google AI, and asked about finding a bit to change, etc. The answers sounded reasonable (AI is sometimes very good at that, so I am not sure if all were true ...) For one thing, it said the setting was in special partition. It might have said encrypted. And that the special protection firmware in the T-Mobile models check any changes to that partition. I saved the interaction to a file, but have not edited it for clarity yet.
But it was convincing enough to completely give up on BE2028, and the Metro model (# ?).