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-[* black] Just like its forerunner the A50, the A51 also features an optical in-display fingerprint scanner which is placed on the daughterboard.
- [* icon_note] Optical in-display fingerprint scanners work by projecting light. The functioning area of the in-display scanner illuminates the finger. The sensor underneath the screen grabs an image of the fingerprint.
+[* black] Just like its forerunner the A51 also features an optical in-display fingerprint scanner which is placed near the daughterboard.
+ [* icon_note] Optical fingerprint sensors work by illuminating the finger and taking an image of the bright and dark areas representing the ridges and valleys of the fingerprint. ([https://www.ifixit.com/News/14385/how-ultrasonic-fingerprint-sensors-work|More on fingerprint sensor technology.|new_window=true])
[* black] The daughterboard comes out without a fuss and brings the USB-C plug and the beloved 3.5 mm audio jack to light.
-[* black] Because the USB-C is soldered to the daughterboard, there is a risk it will suffer after frequent use and unfortunately it is not easy to replace if it is broken. With the separate audio jack you can at least relieve the USB-C while listening to music.
+[* black] With the separate headphone jack the wear and tear on the USB-C port is reduced. But replacing either one requires soldering skills and is unnecessarily complicated.