Can a tag hold several ways to reach you?
Only through a page. A tag can physically carry several records, and the phone acts on the first one it can handle, so everything after it is carried and never seen. One address leading to a page listing your methods is the arrangement that works.
The phone takes the first
Records can be stacked on a tag, and the system acts on the first it recognises. There is no mechanism for offering a choice.
So a tag holding a phone number and an email address offers one of them, decided by order, and the other is invisible.
The extra records still cost memory and still lengthen the read, which is the worst combination: a cost with no benefit.
This is the same limit that defeats two Wi-Fi networks on one tag, and it has the same answer.
The page that works
One short address to a page listing everything: phone, email, messaging, social, a booking link, whatever applies.
The page can also offer a contact file to download, which gives the recipient what a written contact record would have given them.
And it can be changed whenever anything changes, which a written record cannot.
It works identically on both platforms, which several record types do not.
Letting them choose
The value of a page is that the other person picks the channel, and they know better than you which one they will actually use.
Put them in the order you would prefer, with the one you actually read first, and let them decide.
Label them if it matters: which number is for work, which one is a message only line.
Keep it short. A page listing eleven ways to reach you communicates that none of them is reliable.
The offline exception
Where you hand a tag over somewhere with no coverage, a page is unreachable and a written contact record is the only thing that works.
Then accept one method, chosen deliberately, plus whatever the contact record format carries.
Keep the fields minimal, since each one is bytes, a longer tap and one more thing to become wrong.
And rewrite the tag when something changes, which you can do because it is a tag you kept.
Frequently asked questions
What happens if I put two records on a tag?
The phone acts on the first it can handle and ignores the rest. They cost memory and reading time for nothing.
How many methods should a page list?
Few, in the order you prefer. A long list communicates that none of them is reliable.
Can the page offer a contact file?
Yes, and it is usually the most useful element. It gives the recipient what a written contact record would, and stays correctable.
What if there is no coverage?
A page is unreachable, so a written contact record is the only thing that works. Keep the fields minimal.