For the HF tags, Yes. The LF tags have ONLY an ID stored on them, and those can be rewritten if you choose to.
This is correct. HF tags have the ability to do extra things (Store business cards, open websites, etc) but for unlocking things and triggering switches, it’s nearly always going to be the ID that triggers that (I say nearly to cover my ass, I haven’t seen anything on here where a data record unlocks something, but It probably exists)
Yes, However. You’d need to do research to see if the lock’s firmware will allow you to use the implant you get. There’s been a lot of people on here lately getting upset at samsung for basically blocking their chips from being used due to formatting standards or some such. Case in point
Again, I don’t want to use an absolute, because someone, somewhere, has probably rendered that statement false. but in the majority of cases, yes. The device is coded to accept your ID, not the other way around.
You do have to take into account formatting of the implant and device (Which is why a lot of us have multiple implants) but as long as all that lines up, you’re good to go.