my camera takes pictures with a red in the corner of the lens

[AC Question]

if i'm taking a picture of myself and i use my phone sideways the top edge on my phone shows this big red spot and it ruins the picture especially if there isn't enough light the red spot will go throughout the whole picture.

 

[ManiacJoe]

Which phone?
Which version of android?
Which carrier?
Which camera app?
Can you link us to an unedited example photo?