Jmp.chat provides an adapter (a eUICC device?) that can be used to store an eSIM on a physical card. I have such an adapter that I have already used for a plan tied to my identity. Is it safe to purge the chip, and then to reuse it for anonymous communications?
I think the eID should be unique and gets transmitted.
That’s probably the ID that forbids me from installing (another) speedtest eSIM, though “ID” could also refer to IMEI perhaps. I’d have to try another phone.
Based on this, it is a part of the transmitted information, if I understand it right: https://www.sharetechnote.com/html/Handbook_LTE_eSIM.html