Why do I have a thick line appearing when I press the home button or the power button?

[AC Question]

a thick line appears when i press the home button or the power button

i saw a line appeared on the screen on the rightside of the password bar. it happend after updating my device s4 GT-19500.... that line just pops-up when i press the home button or the power button

 

[B. Diddy]

Re: a thick line appears when i press the home button or the power button

Welcome to Android Central! Can you show us a screenshot? http://forums.androidcentral.com/am...ide-how-post-screenshots-android-central.html