A little thing to keep in mind: if you intend to share your contact info with iPhone users, an iPhone won’t automatically open Vcard data from an NFC chip.
A workaround is to have your implant link to a website that allows for Vcard download.
An interesting thread: https://forum.dangerousthings.com/t/vcard-on-xsiid-done/6060
Edit 19.9.20 at 10:55: striked through “automatically”