The OnePlus 12 features an in-display optical fingerprint sensor. Users set up the fingerprint sensor through the device settings by navigating to Security and Privacy, choosing Device Unlock, and then registering their fingerprint by repeatedly placing their finger on the sensor area at the bottom of the screen. The fingerprint recognition process is accelerated by the sensor's ability to capture different parts of the finger with each press, resulting in a secure and responsive setup experience.
In terms of performance, the OnePlus 12's fingerprint sensor is generally regarded as fast and accurate when used without a screen protector or with a certified one. However, some users experience issues with fingerprint recognition when using certain tempered glass screen protectors, which can reduce the sensor's effectiveness significantly. The sensor works best on clean, uncovered screen glass and provides haptic feedback on successful fingerprint recognition, which aids in knowing when the phone is unlocked promptly.
Comparatively, the fingerprint sensor on the OnePlus 12 outperforms some recent devices known for slower or less reliable fingerprint sensors. For instance, users have found the OnePlus 12 sensor much faster and more dependable than the optical fingerprint sensor on the Google Pixel 6 or 8 Pro, which was notably slow. It also surpasses previous generation sensors like those on the Samsung Galaxy S23 Ultra, where users have complained about delays and unreliable unlocking, especially with drier skin or cooler weather. The OnePlus 12's sensor provides quicker and smoother unlocking with better haptic feedback.
The OnePlus 12 uses an optical fingerprint sensor instead of ultrasonic technology. Optical fingerprint sensors use light to capture fingerprint images through the display, while ultrasonic sensors use sound waves to map the fingerprint's 3D structure. OnePlus appears to continue with optical sensors, which offer fast response times but can be more sensitive to screen protectors and dirt. Ultrasonic sensors, used in some Samsung devices, tend to perform better under various conditions like wet fingers or screen protectors but are sometimes slower or less consistent depending on implementation.
A unique aspect of the OnePlus 12's biometric system is the interaction between its fingerprint sensor and face unlock feature, which can affect user experience. Unlike some devices where face unlock and fingerprint unlocking function independently, the OnePlus 12 prioritizes whichever biometric method is recognized first. If face unlock is triggered while trying to use the fingerprint sensor, the fingerprint sensor will temporarily not respond, forcing the user to swipe to unlock the device. This behavior is reported as frustrating by some users since it interrupts seamless unlocking.
Regarding the face unlock itself, though not directly about the fingerprint sensor, it is notable that OnePlus 12's face unlock is highly praised for speed and reliability, often making the fingerprint unlock less necessary. Face unlock on the OnePlus 12 works well even in challenging conditions such as wearing hats, sunglasses, and low light environments, enhancing overall biometric convenience.
In summary, the OnePlus 12's fingerprint sensor is a high-performing in-display optical sensor that excels in speed and accuracy compared to many recent smartphones, particularly when used without or with compatible screen protectors. It provides good haptic feedback and intuitive setup. The main downsides reported center on its sensitivity to screen protectors and its interaction with the face unlock system, which can occasionally disrupt fingerprint unlocking. Relative to other recent flagship devices, it stands out as a competitive biometric solution, especially against models known for slower or less reliable fingerprint scanning technology.