Samsung introduced the Infinity Display design language last year with the Galaxy S8 and S8+, drastically cutting down on the front bezels. To accommodate a full-screen front, the company had to eliminate the physical home button and move the fingerprint sensor to the back of the phone. While the thin-bezel display made for a more immersive experience while using the phone, the position of the fingerprint sensor next to the camera module wasn't ideal. The S8 and S8+ sported large displays, and the tall form factor meant it was awkward to reach the fingerprint sensor.

The close proximity to the camera module also meant that users often got finger grease all over the camera sensor when they were looking to unlock the phone. The Note 8 didn't make things any easier — the phone was taller and wider than the S8+, making it even harder to reach the fingerprint sensor. Verizon is offering the Pixel 4a for just $10/mo on new Unlimited lines