The Mate 10 Pro was released a few months ago, with the Huawei flagship getting mixed reviews after launch: its camera and performance hailed, but the lack of a headphone jack raised the ire of enthusiasts. A user on Reddit has claimed that his new Mate 10 Pro shipped with a faulty fingerprint sensor.
According to the user, the device, bought at a Huawei store, registered their left index finger to be the same as their right, and could be unlocked by a friend after that. Recalibrations, reboots, and factory resets did not fix the issue. The issue also persisted on another new unit gotten from the same store.
We're not sure what exactly the problem is. It's most likely a hardware issue with a batch of devices (it also occurred on a new device from that store). There's also a much lesser chance that it's a problem with software. Or the user's story may have skipped some details.
Other users on the thread stated that their units did not, in fact, suffer from the issue, so it's likely localized. Sadly, we haven't been able to get the location of the store where the faulty devices were purchased. We'll be sure to keep you updated on this, though.