Smartphone sensors like the fingerprint sensor under the screen play an important role in everyday mobile use. They help you unlock your phone quickly, secure your data and make your experience smoother. But sometimes users find these sensors not working as expected and that can be frustrating. Let’s break down the common issues consumers face and how they can be resolved in practical ways.

What Causes Sensor Problems?

Most smartphones use under-display ultrasonic fingerprint sensors that sit beneath the screen surface and read your fingerprint using sound waves. While this technology enables sleek full-screen designs and fast biometric security, its performance can be affected by a few everyday factors.

Here are the most common things that can interfere with reliable sensor performance:

  • Unauthorised (local shop/store) Screen protectors that block or diffuse ultrasonic waves interfere with how the sensor reads your fingerprint.
  • Dirty, wet or very dry fingers sometimes don’t create a clear print pattern for the sensor.
  • Software settings or outdated system software that aren’t optimized for your device’s current configuration.
  • Incorrect fingerprint registration, for instance, when the finger isn’t placed fully or consistently during setup.

It’s important to note that these are usually not hardware faults. In most cases, they are simple usage or environmental factors that people might not immediately suspect.

How You Can Fix These Issues?

Here are steps you can try if your fingerprint sensor feels unresponsive:

  • Use a compatible screen protector or Authorised Screen Protector suggested by vivo: Today’s smartphones undergo strict durability and drop tests, making the screen strong enough for daily use. Many devices also come with a factory-fitted protective film that is sufficient. Some third-party tempered glass protectors can interfere with ultrasonic sensors. Removing them or using a certified protector can often improve performance.
  • Clean the screen and your finger: Oils, moisture, or dirt can distort the sensor’s reading. A clean surface and dry finger can improve recognition significantly.
  • Re-register fingerprints carefully: Go to Settings and redo the fingerprint setup. Make sure your finger covers different angles of the pad area.
  • Update your phone software: System updates often include improvements that help sensors work more smoothly with the hardware.
  • Restart your phone: A simple restart can clear temporary glitches and restore normal performance.

When to Reach Out for Support?

  • If you’ve tried these steps and your sensor still doesn’t work reliably on your vivo phone, vivo’s support system is designed to help you through:
    • 24×7 WhatsApp and call support connects users with trained advisors who can guide you step by step.

By understanding how these sensors work and how everyday conditions affect them, you can keep your device running smoothly and enjoy a reliable, secure mobile experience.