O Google Pixel 4 and Pixel 4 XL were recently launched with a dual camera and radar chip to recognize hand gestures. They also came with two software problems that will be fixed with an update: it is possible to use facial unlocking even if the user is sleeping; and the 90 Hz screen only reaches that frequency when the brightness is high.
Pixel 4’s facial recognition is similar to iPhones’ Face ID: it uses a dot projector and two infrared cameras to illuminate your face and get a 3D depth map. That is, you can’t fool him with a photo or video.
However, the Pixel 4 facial unlock works even if the user’s eyes are closed. That is, someone can pick up the phone, point at your face when you are sleeping, and get access to your data.
Google warns you about this on a support page: “Your smartphone can also be unlocked by someone else if it is directed at your face, even if you have your eyes closed; keep your smartphone in a safe place, such as in your front pocket or purse ”.
By default, iPhone’s Face ID requires that your eyes are open to perform facial unlocking. It is possible to disable this rule in the settings, but there is a warning from Apple that it makes biometrics less secure.
In a statement to the The Verge, Google says it’s “working on a option for users to require their eyes to be open to unlock the phone, which will be delivered in a software update in the coming months ”.
Google Pixel 4 disables 90 Hz mode depending on brightness
As for the 90 Hz screen, Reddit users have discovered that she maintains that frequency only when the brightness is above 75%. Below this threshold, the Pixel 4 will return to the 60 Hz standard. That is, users will notice a change in the fluidity of the interface as they move from one place to another with less ambient light.
It is possible to force the Pixel 4 to always maintain the 90 Hz frequency rate in the settings; you must first activate developer mode on Android 10. However, this can affect battery life.
Google explains to The Verge that in some situations, the screen will enter 60 Hz mode to improve battery life. For example, this happens after enabling energy saving; when watching videos (which are usually recorded at up to 30 fps); and under certain ambient light conditions.
The company states: “We plan on updates that we will release in the coming weeks and that include the 90 Hz activation in more screen brightness conditions“.