Review: Vivo X21 is the future, but it came too soon

First widely available phone with an under-the-display fingerprint sensor • Good camera performance

Fingerprint sensor takes getting used to • Pricier than direct competitors

The Vivo X21 is the first of its kind, and most of the time its bleeding edge tech works well. However, it’s pricy for what it offers, especially once the wow factor wears off.