I was told that every time iphone updates that it loses the data from the touch id finger print. Is this true?

I was told that every time iphone updates that it loses the data from the touch id finger print. Is this true? - 1

Course not.

It does not but you'll have to use your passcode after it reboots. Just so it knows it's you.

No i have updated many times and this has never occurred

It does not "lose" anything, but the first time you try to access the phone after an update - or any time it has been shut off and restarted - you must use your PIN code rather than fingerprint.

I think the idea is you must keep using your PIN occasionally so have less chance of forgetting it.