Screen for replacing your mobile phone's factory screen in case it broke or stopped working. It does not come with a frame, so you will need to detach the damaged screen from its frame to attach the new one. 

This process can be difficult and complicated, as it requires removing components of the mobile phone. If the old frame is worn out, it will need to be replaced. It is compatible with the Galaxy A21S. If you are not familiar with such repairs, it is recommended to consult a specialized technician as any mistakes could result in problematic screen functionality.