Last September, some Pixel users who use the PIN code to unlock their Android could not sign in to their device. Two months later, it seems that this bug has not been fixed and is now affecting third-party smartphones.
There are users of smartphones from Sony and OnePlus who are starting to complain about the same problem. This bug is apparently affecting models running Android 9 or Android 10.
Users cannot access your smartphone by its PIN code
The bug in question occurs when users try to use your PIN code to enter your smartphone. After validating your code, the smartphone screen turns off and then back on the lock screen, as if nothing had happened.
That is, if you have no other method of authentication enabled or available, you will be unable to access your device. A scenario that can be problematic for those who really need to use their smartphone.
Problem will stem from a process of validating your password
Recent Discoveries maintain that the cause of this bug is a method called “Synthetic Password Key”. In short, this method compares the code you entered as stored in the system.
It appears that this procedure is not being completed, returning a null value. It is this null value that is causing Android to crash.
As far as we know, this problem is not widely dispersed in the market, affecting a small group of users. Even so, it is important to alert you to using various smartphone unlocking methods whenever possible.
Google has said that it is aware of the issue and has already referred the case to the appropriate department. However, a solution has not yet been shipped to market.