How reliable is the fingerprint scanner on refurbished Galaxy S24 models

Performance Overview

1. Speed and Accuracy: Many users have praised the ultrasonic fingerprint sensor for its speed and accuracy. Reports indicate that it can unlock the device quickly, even at various angles, and some users have noted that it performs better than previous models like the S21[1][3]. The S24 Ultra utilizes a newer version of Qualcomm's ultrasonic sensor, which is designed to be faster and more reliable than earlier versions[3].

2. Challenges with Screen Protectors: A common issue arises when using screen protectors. While some users report satisfactory performance even with protectors, others experience significant delays or failures in recognition, especially with dry fingers[2][4]. Recommendations include registering the same fingerprint multiple times to improve recognition rates, particularly when using screen protectors[2].

3. User Experiences: Feedback is mixed; while some users find the scanner works flawlessly, others report frustrations, particularly if they have dry skin or if the screen protector interferes with the sensor's function. Some have expressed that their experience has been less reliable than expected, stating that it sometimes fails to unlock even without a screen protector[4][5][6].

Recommendations for Optimal Use

- Fingerprint Registration: Users are advised to register multiple versions of their fingerprints (e.g., different angles or parts of the finger) to enhance recognition accuracy.
- Screen Protector Choice: Opt for high-quality screen protectors specifically designed for compatibility with ultrasonic sensors to minimize interference.
- Moisture Consideration: Keeping fingers slightly moist can help improve recognition rates for those who experience issues with dry skin.

In summary, while the fingerprint scanner on refurbished Galaxy S24 models generally performs well and is considered one of the better options available, individual experiences may vary significantly based on usage conditions and accessories like screen protectors.