Method/Steps
Click to set touch ID and password, first check whether there is an ID, and then test the fingerprint! Remember, the fingerprint must be tested before it is considered tested. Then test the WiFi function. After entering the WiFi interface, if the number of WiFis searched is constantly changing, sometimes a lot and sometimes a little, it means that there is a problem with the WiFi function. Finally, enter the ringtone interface, press the volume + and - keys several times, and move the mute key up and down several times. If there is no problem, proceed to the next step.
In the SMS interface, against a pure white background, bright spots, gray dots, and even hair and dust can be seen. This is a backlight problem, not a machine quality problem, and will not affect the use of the phone. Still in the SMS interface, after reading the white interface, pull down the status bar at the top and look at the gray interface. You can see abnormal dotted lines in this interface. If you don’t see anything with special colors in this interface, then proceed to the next step.
Compass, first check whether the compass rotates normally. If there is no problem, slide left. The white interface can be tested again. This mainly depends on the black interface. The black interface is used to see the crushing. When your mobile phone’s outer screen is broken and you want to replace the outer screen, you will look at the black interface. If there is no other color, then go to the next step.
Voice memo, record a voice by yourself, listen to it in the handset mode, remember to put your hand on the front camera to test whether the light sensitivity is normal. The screen is off, which means it is normal, then turn on the speaker mode and listen again. There is no noise in the handset and the speaker, then you can go to the next step.
In the main interface, drag an application at will, drag it along the "Z" shape from top to bottom, and then drag it along the edge of the screen. In the middle, if the application does not keep up with the hand movement, focus on testing the lost position and then continue. After the test, if the application icon automatically returns to its original position, it is OK, and go to the next step. This step is mainly to test the sensitivity of the screen touch. Don't drag too fast. Focus on the edge and corner areas. If it is a 6S or higher model, test whether the 3D touch function is OK. Test the camera, front and rear cameras. If the display is normal, it means there is no problem. Test the flash as well. Serial number and serial number (IMEI) Serial number is what everyone likes to ask when buying a phone. These two are equivalent to the ID card of each iPhone. You can check the activation time and warranty time of the iPhone. For out-of-warranty machines, it is not very meaningful. After the machine is received, just check whether the information of the machine in your hand is consistent.