Together, the four Chinese companies make up a third of the world's active smartphones." With China leading the way, many of the countries where non-Apple devices are selling better than iPhones are not known for their overarching concern about consumer privacy, much less laws protecting it.
Therefore, 38% of all the devices they tested would allow malicious third parties to immediately unlock phones that only use facial recognition as a locking mechanism and to gain access to all the data contained within, from photos to sensitive banking and personal data.
The paper outlines that some SSD drives (including Samsung and Crucial) do not actually encrypt the data properly, and that they can be easily by-passed without a system password.
The first patent showed an implementation of the fingerprint reader on the screen similar to what we see on other smartphones, where only part of the screen can be used as a fingerprint scanner. However, the second patent describes a more advanced fingerprint scanner that uses the full-screen screen and a low-power independent processor.