So I was at school earlier today and pluged my phone to charge and well it just poped up didnt notice it at first but then I saw it and kinda woried so I shut it down and restarted it and it didnt go away so Im here now, Got any advice? 
@Juan Ortega: To see if the issue is hardware related, please head to the Phone app, dial *#0*# into the telephone keypad, then select Red, Green and Blue from the series of grey tiles. If the line is present in any of these tests, then please head to samsung.com > Scroll to the bottom of the page > Contact us, and get in touch with our Support Team via your preferred contact method, and an advisor will be able to assist you further, and arrange any necessary repairs.
