If you have a with the educational Linux system (not Android), the process is different—you may need a bootable USB or recovery image from the Canaima project (which is discontinued but some community archives exist).

Here’s a clear, helpful review of the most common methods to unlock a Canaima tablet when you’ve forgotten the password, based on typical user experiences. Overall rating: ⭐⭐⭐☆☆ (3/5 – Works, but with limitations)