I believe you are talking of Vivo X21 UD launched in India and internationally as X21. They are charging a very hefty premium for the under display fingerprint scanner which neither is as accurate or fast as normal fingerprint scanners.
No doubt for similar performance and even better-built quality people should opt for Nokia 7 Plus which retails INR 11K cheaper rather than heftily overpriced X21 UD. One Plus 6 is in a different league in terms of performance and with a budget of INR 36K, should blindly opt for OP6.
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