Over time, touchscreenuile have improved steadily, if at the beginning the first devices had to press firmly and repeatedly or use a stylus, now the accuracy and response time is very good.
With time some touchscreenuri lose their sensitivity and precision of poor quality or if they have problems at the outset.
I will present how you can activate a function that is built into the Android system that allows the touch screen test. First you have to activate "Developer Options". Find here how to act.
1. To activate the touchscreen function test you have to enter the Settings> Options developed it
2 .Trebuie to enable options to be available for change. First Touch comuntatoru