Test touch screen and other smartphone sensors
To test screen after replacement or after installing new screen guard or on a new mobile, we can dial
in dialer. The diagnostic window opens even without requiring press of 'dial (green)' button. Then we can choose between "TSP dot mode" and "TSP grid mode" to check the screen. Other sensors such as vibration, camera, speakers, accelerometer, proximity, bluetooth, light etc. can also be tested.