If you’re curious whether the OPPO K12x 5G offers a fingerprint sensor—and how well it performs—you’re in the right place.
In this article, you’ll get the full picture: what type of fingerprint scanner it uses, how fast it is, its pros/cons, and how it compares with competitors. Let’s dig in.
What Kind of Fingerprint Sensor Does OPPO K12x 5G Use?
The OPPO K12x does not use an under-display fingerprint sensor. Instead, it has a side-mounted fingerprint scanner integrated into the power button.
Reviewers note it unlocks quickly and allows registering up to 5 fingerprints.
This design choice is common in mid-range phones where manufacturers prefer reliability and cost-efficiency over more premium under-screen solutions.
Performance & User Experience:-
Speed & Responsiveness
In tests, the side-mounted sensor consistently unlocked the phone instantly with minimal error. Because it is physical (not optical under display), it rarely struggles in bright or low-light situations.
Support for Apps & Payments
You can use the fingerprint sensor for local app locking and even payment authentication (depending on region support).
Reliability & Convenience
Being on the side means your natural grip often aligns with the sensor automatically—no awkward finger reaching. But if you’re left-handed or use the phone unusually, it may take slight position adjustments.
Pros & Trade-Offs:
Pros:
- Very fast and accurate because it’s a physical sensor.
- Less likely to misread compared to cheaper under-display sensors in budget phones.
- Works consistently even when fingers are slightly moist.
Trade-offs:
- It’s not hidden under the display, which some users prefer for aesthetics.
- Being side-mounted means accidental touches may occasionally happen.
- In foldables or unique grip styles, reachability could be less comfortable.
Comparison: Side Fingerprint vs Under-Display
| Feature | Side-Mounted Sensor (like K12x) | Under-Display Optical / Ultrasonic |
|---|---|---|
| Speed & accuracy | Higher reliability; minimal misreads | Depends on sensor quality; can be slower in some lighting |
| Cost & complexity | Low to medium | Higher |
| Aesthetic | Visible on frame | Invisible under glass |
| Durability | Less susceptible to scratches since not under display | Could degrade with screen protectors / scratches |
| Use in extreme conditions | Less affected by light / glare | Can struggle with sweat, screen protectors or brightness |
For many users, a side-mounted sensor is the safer bet in real-world daily usage, especially in this mid-tier segment.
How OPPO Positioning & Specs Support It?
The official specs confirm that biometric support is included, but do not specify “in-display.” OPPO’s More detailed sites and reviews confirm that the fingerprint sensor is side-mounted, not underthe display.
The phone’s robust design (MIL-STD durability, IP54 splash resistance) suggests OPPO prioritized reliability. Implementing a side sensor helps in long-term durability, too.
Final Thoughts (For You as a Buyer):-
If you’re considering the OPPO K12x 5G, rest assured, the side-mounted fingerprint sensor is a strong, practical choice. You won’t get the “wow” factor of an in-screen sensor, but in everyday us,e it’s faster, more reliable, and less error-prone.
Automotive industry analyst with 3+ years of experience dissecting market trends, emerging technologies, and consumer insights. His expertise fuels data-driven perspectives on swagatswork.com, empowering professionals to navigate the evolving automotive landscape.