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Hi mrshix, The Pixel 4a 5G has a back-mounted fingerprint sensor for fast unlocking. To see the full list of tech specs, please visit: g.co/pixel/specs.
Yes, it does. It will have you set this up when you first setup the phone (or you can go into settings and set it up later if you prefer). It only has you setup 1 finger during the initial setup. I went back into settings and setup the index finger on my opposite hand as well. Very convenient.
