after the October security patches the galaxy s7 device has started hanging so plzzz fix the performance issue on the phone samsung

while diagnostic the galaxy s7 the error was found is that the (battery life status:bad )what does it mean and how to solve it

hiii , i am using galaxy s7 device . and it hase some white areas on the edges of the display but the touch screen has nothing so i went to the service center they said it has a colour splash so what does colour splash means ????

hiiii, I am using galaxy S7 and facing issues with the draining of battery so quickly so plzz support me