We've heard what's inside the Galaxy A5 (2018), now let's look at what's on its outside. A pretty extensive leak details the general design of the 2018 A-series with a focus on the A5 and A7. The back will have a fingerprint reader under the camera - huzzah, why couldn't the Note8 be like that? Anyway, it's a fairly small reader, it looks like it could have been repurposed from a Home button reader. Speaking of buttons, the new A-series will have a Bixby button. We can hear the groans already. At least now Samsung allows you to disable the key. Samsung Galaxy A5 (2018) ...
Source: http://www.gsmarena.com/galaxy_a5_2018_fingerprint_reader_below_the_camera-news-27454.php