Fortunately I don’t need insurance in my country as healthcare is free (obviously if you go in there just to ask if you can flex your implant with an x-ray you’ll get kicked out). You’re right though I should’ve just searched the forum. I realized later it was more complex than a yes/no answer. I honestly didn’t put that much research into nfc, I just wanted an alternative way to unlock my phone. NFC Tools says my tag type is NXP Mifare Ultralight C. I don’t know what that says about frequencies. From the nxp site I can see it operates at 13.56 MHz. The memory is really small though, about 137 bytes. I guess if I want to write more than a single task I’ve got to buy something a little more high quality. For now I’m using it to turn bluetooth on and off lol
This one would be the better option for contact sharing, but the first one has a changeable (N)UID and you can use it for contact sharing but there is a caveat with that…