There's no reason to cite a Google-translated version of this article when a suitable, well-explained English article exists in the New York Times: https://mobile.nytimes.com/2017/04/10/technology/fingerprint...

As the article notes, you really need more than one imprint in order to get into a phone - the authors suggest that five distinct imprints could get into about 40-50% of phones, which fits within the 5 try limit imposed by many systems.