The vivo X21 screen recognition version is a little faster than the vivo X20 screen recognition version. This technology is the Synaptics Clear ID that is developed with vivo's partner new thought technology. It can also accurately identify the fingers in a variety of harsh environments, such as dry, cold, hot, and so on, and support local TLC/AES/ECC encryption to make it secure. A stronger guarantee.
After the actual operation, it can be felt that iPhone X is a bit slower in the process of unlocking, because the face recognition of iPhone X has to have a "slippery" action, and vivo X21 can do "lift hands to unlock" quickly after setting up vivo, so vivo X21 is faster on the unlocking of the face.
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