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I have silver XZ which had a horizontal stripe on touch screen that didnt work. Plus, the brightness would go up and down without any touch.
The phone went to official repair and I got it today. Touch workswor well, but the brightness still moving up and down.
Anyone had this same problem?
Great, but is this a common problem? The touch problem had many users here. But the brightness, Anyone
those are two different topics, try this
settings > display > adaptive brightness > off
as for the touchscreen issue, I don't have that problem, test the touchscreen:
Could you test your device?
Settings > About phone > Diagnostics > Test
Oreo
Settings > Support > Tests