Используйте приложение APKPure
Историческую версию LCD & AMOLED-Test можно получить на Android
Найти мертвых пикселей и суб-пикселей на дисплее - ЖК-и AMOLED-готов
Find dead pixels and sub-pixels on your display.
To switch between colors swipe the screen or touch the screen longer to adjust the brightness.
LCD-Test Pro can try to fix the persistence of dead pixels. You'll find it in the market, too.