Samsung Galaxy Z Fold 8 sparks debate over return of side-mounted fingerprint sensors

The Samsung Galaxy Z Fold 8 is challenging modern smartphone design trends by utilizing a side-mounted fingerprint scanner. This hardware choice has reignited a conversation about whether the industry's shift toward under-display sensors has sacrificed reliability for style.

Integrated into the power button on the device's right edge, the scanner allows users to unlock the phone whether it is folded or unfolded. The Galaxy Z Fold 8, which retails for $1,900 and is powered by the Qualcomm Snapdragon 8 Elite Gen 5 for Galaxy SoC, eschews the hidden sensors found in most contemporary flagships. Tom Bedford of Android Police reports that the side-mounted sensor is "incredibly reliable," noting only a handful of failed attempts over several weeks of use. Bedford argues that the mechanism is superior for unlocking the device naturally while picking it up, stating, "This $1,900 smartphone uses the same kind of unlocking mechanism as $100 phones from a decade ago, and it's better for it."

The shift toward under-display tech

For several years, the smartphone industry has moved almost exclusively toward under-display fingerprint sensors for high-end devices. This transition was driven by a desire for a seamless, all-screen aesthetic. Consequently, side-mounted scanners became relegated to budget models or specific tablets, such as the Galaxy Tab S10 FE. By maintaining this "old-school" approach, Samsung has positioned the Z Fold 8 as a contrast to the prevailing trend of hiding biometric hardware beneath the glass.

Usability vs. Aesthetics

The preference for side-mounted hardware stems from documented frustrations with under-display technology. According to Android Police, under-display scanners often struggle when a user's fingers are wet or dirty. Furthermore, these sensors typically require the screen to be active before they can function, adding a step to the unlocking process that side-mounted sensors avoid.

This tension suggests that manufacturers may be prioritizing a "seamless" look over the actual user experience. If high-end consumers find the ergonomic and reliability benefits of side-mounted sensors significant, it indicates a market demand for diversifying biometric hardware to improve overall accessibility and user satisfaction.

The future of biometrics

While the Z Fold 8 proves that a premium device can succeed with older hardware configurations, it remains to be seen if other manufacturers will follow suit. The current industry trajectory favors the invisibility of the sensor, but the reliability of the Z Fold 8's power-button integration provides a strong argument for a return to physical sensors. Whether this leads to a broader comeback of side-mounted scanners across more smartphone models or remains a niche preference for foldable users is the key question for upcoming hardware cycles.