A technician replaces the cracked display assembly on a corporate smartphone. After reassembly, the user can only unlock the handset with a passcode, and the operating system reports that no biometric hardware is detected. Which part did the technician most likely fail to move from the original screen to the replacement assembly?
The Wi-Fi diversity antenna lead
The capacitive fingerprint sensor integrated with the home/side button
The near-field communication (NFC) antenna flex cable
On many smartphones, the capacitive fingerprint reader is a separate flex-cable module that sits behind the home or side button and must be transferred when a screen assembly is replaced. If that sensor is not reinstalled or is damaged, the OS will disable biometric login and fall back to a passcode. The NFC antenna, front microphone, and Wi-Fi diversity antenna are unrelated to fingerprint authentication, so leaving them out would not cause the biometric hardware warning.
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