Various electronic devices are equipped with special menus that are used by the manufacturer's service personnel for repairs. Of course, smartphones are no exception. Especially for Android, each manufacturer has a "service mode" that allows you to check the status of your device. Let's take a look at the hidden commands for displaying the service mode on your smartphone.
Click here for an image showing the test mode with the "hidden command" on your smartphone >>Samsung Electronics' "Galaxy" hidden command launches the Galaxy phone app instead of the Android phone app. If you enter "* # 0 ****" here, you will be in test mode.
In test mode, you can test more than 20 items such as touch breaks and the status of various sensors. You can also check the line status by typing "* # 0011 #" to make a call.
For the hidden command of "Xperia" of Sony Mobile Communications, start the phone application and enter "*## # 7378423 #****". Then push the call button. You are now in "Service" mode.
You can check IMEI, corresponding bands, etc. from "Service info". In addition, if you enter "* # 06 #", IMEI will be displayed, and if you enter "* # * # 7465625 # * # *", you can check the SIM lock.
For the hidden command of ASUS "ZenFone", start the calculator app and enter ".12345 + =". Then you will enter the "Single Test". You can check 27 items such as CPU usage rate and accelerometer.
Hidden commands such as Huawei's "P20 Lite" can be sent by launching the phone app and typing "*### 2846579 #****". The "Project Menu" is displayed and the service mode is set, so you can check the remaining battery level and temperature, and initialize the battery.
In addition, there is a hidden command to "factory reset" that is common to Android devices. After turning off the power of the Android device, press and hold the power button and volume down button. "Factory reset" is possible from "Recovery mode".
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