Child Monitoring and Security Information Archive 2019 - 13.47.57
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This tests out your fingerprint scanner. Tap on "Normal Scan" to commence testing, which will take place automatically to check if all components are functioning properly. Tapping on "Sensor Information" will reveal details like firmware version that you can look through.
Tapping on the "Sleep" button will test out your device's sleep functionality. Doing so should immediately put your phone into sleep mode. Once done, wake your phone as you normally would, and you'll automatically be taken back to the main diagnostic page.
Samsung Phone Number
Tap on "Mega Cam" to test out your main camera. Use the volume buttons to zoom in and out, then tap on the camera button on the bottom of the screen to snap a photo. Please note that flash is on by default, and your test photo will also be saved in your gallery. Once you're done testing the camera, tap on the back button to exit out to the main diagnostic screen.
This tests for the functionality of your device's magnetic sensor. Tapping on "Selftest" will initiate an automatic test to see if your device passes or fails. If you want to test manually, tap on "Power Noise Test," then run a magnet around your phone. On the S8, for example, the magnetic sensor is located along the top-left corner of the phone, as evidenced by the magnetic spikes on the graph when a magnet is close to that area.
Last but not least, the "Iris Camera Test" tests out the infrared iris camera that's used to unlock your device. Tapping on the button pulls up your iris camera for you to align your eyes with, and will instantly close and go back to the main diagnostic page once it's successfully scanned your iris.
"Vibration" tests out your phone's vibration motor. Your screen will go black once you tap on the "Vibration" button, accompanied by a constant vibration. Tap on the screen once to exit this test and go back to the main test screen.
MST, which stands for magnetic secure transmission, enables devices to temporarily read your phone as a credit card. This sensor is essential when using payment services such as Samsung Pay. MLC, on the other hand, is technology that's utilized in fingerprint sensors. There's not much in the way of tests in this area, which seems to be geared more towards developers to tinker with.
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As its name suggests, this sensor is in charge of detecting ambient light. Tap on "Light Sensor" to initiate the test, then expose your phone to light of varying brightness. Three levels should register in turn, starting from "Level 1" for dim lighting all the way up to "Level 3" for extremely bright.
Once you're done performing your diagnostic tests, you can now exit HwModuleTest Mode. To do so, simply tap on the back button twice to go back to your phone's dialer, then exit from there as you normally would. You're now free to go on with the rest of your day, knowing that all is right with your beloved device!