Vivo X21 Review: Is the In-Display Fingerprint Sensor A Game Changer?

While everyone's been following Apple's lead with face recognition as the new form of smartphone biometrics, Vivo has fulfilled the prediction that was earlier made for iPhones - an in-display fingerprint scanner. Not only does this eliminate the need of a separate fingerprint scanner button on the device, but is also pretty revolutionary in the way it works. But is that all there is to the new Vivo X21? Here's our review.