We would assume that the lone circle below the cameras is the fingerprint scanner, but there is no confirmation of that. Anyone who can count can see that there are seven smaller circles on the back of that smartphone. Since the leak tips five cameras, the other circles might be for laser element and LED flash.
The source of the leak is claimed to be Foxconn, which builds devices for numerous mobile device brands -- including Apple -- and is known to be notoriously leaky. There is no way to know if this might be the rumored Nokia 10 smartphone, but it could be.
Other Nokia 10 smartphone rumors tip a Snapdragon 845 SoC, 18:9 aspect ratio display and a glass back to support wireless charging. Rumors about the Nokia 10 are making the rounds lately, and the Nokia 9 only crossed the FCC last month. That device has a 5.5-inch screen, 3250 mAh internal battery a Snapdragon 835 SoC and an OLED display.