What is engineering mode in Android
Powerful: Secret Codes for Android Phones
Like conventional cell phones, Android smartphones also have the ability to look deep into the innards of the system and intervene. Various information can be called up using the appropriate codes, tests can be carried out, but complete system resets can also be carried out without any further query.
First of all: whether and which combinations work with which phone depends on the Android image of the manufacturer. The character combinations can be changed and deactivated in the course of creating the system. And of course all experiments are done at your own risk and are only recommended for experienced users. Saving the codes as telephone numbers does not work, by the way, as this leads to an automatic attempt to dial.
Engineering mode is recommended for warming up. Two of the possible codes - which are entered in the dialer window and triggered immediately when working - is * # * # 3646633 # * # *. This menu reveals more detailed information on the respective device. The proximity sensor and other components can be tested. Various settings - such as adjusting the volume levels - can be made.
* # * # 4636 # * # * brings something similar to light. This means that additional information on the phone, battery and Wi-Fi can be called up. For this purpose, the current usage time of various apps is displayed down to the millisecond. The service mode offers another menu with tests and settings under * # * # 197328640 # * # *.
Camera update and media backup
Those who are familiar with Android in detail can update the firmware of the camera module themselves. The current version number can be viewed via * # * # 34971539 # * # * and new software can be uploaded via an image or the SD card. If you do something wrong here, you run the risk of wrecking your recording device.
The combination for the media file backup is a little more complicated. This feature is controlled via * # * # 273283 * 255 * 663282 * # * # * and enables all image, sound, video and voice memo files to be saved.
Skip shutdown menu
Some Androidians might find the code * # * # 7594 # * # * helpful. This should allow the function of the on / off button to be changed so that from now on the phone shuts down immediately when it is pressed and no corresponding menu is displayed. Entering it again will undo this.
* # * # 7780 # * # * and * 2767 * 3855 # are more tricky. The first row offers a reset of the Google account on the phone and deletes system settings and downloaded apps. However, pre-installed programs and the contents of the SD card are retained. In addition, the action must be approved via a prompt. Such a reset can also be called up via the regular settings menu of Android.
The second sequence of characters leads to much more radical consequences. It deletes the internal phone memory and with it all files and settings of the user. Then Android is set up again. Once entered, the action is carried out immediately and can only be stopped by quickly removing the phone battery.
There are also numerous other codes that usually allow access to individual component tests. You can find them in this list. In a short test run on two different Android phones, only a few of the combinations worked. (gpi, derStandard.at, 04.08.2012)
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