I had my phone for around 10 days before the screen started glitching out then the touch screen stopped working. Problems I found for S4 on youtube where close but not the same as mine. My out video of my problem - youtu.be/zKH5JmwDkks In my opinion the device got hot and fried something after a small run, I put it on the charger not soon after then the screen starts glitching out. Coincidence maybe.