Android engineering menu and secret codes. What allows Android OS to be configured through the engineering menu? Sound volume, sensors and much more, read about all this in our article.
Our smartphones carry a lot of secrets that are hidden by manufacturers. Do you know anything about the engineering menu on Android? Have you heard about the secret codes? Once opened our article, it means something remotely, but heard. All these tools appeared even at the birth of the first mobile phones, but, naturally, over the years they became more functional and understandable.
However, it is worth noting immediately that the plans of manufacturers do not include making the engineering menu or secret codes for Android (which is clear from the name) available to everyone. And that makes sense. Let’s go in order.
What is the Android engineering menu, secret codes?
So, Engineering Mode (engineering menu) is a special application that is installed on almost any smartphone. Used by the manufacturer to conduct various tests and optimize the functions, sensors and other parameters of the phone or tablet.
By default, it is hidden in the system so that every user cannot access it. It is called, as a rule, by means of a small code entered using a standard dialer. Due to the wide capabilities of the Android operating system, access to the engineering menu, as well as its management can be carried out using third-party applications.
Why is the engineering menu hidden? Using the application features inadvertently can damage your smartphone or other device. As noted above, the engineering menu is intended for manufacturers (developers, for testing). Therefore, you should be careful when making any changes here.
Secret codes for Android (service, engineering) are somewhat different from the menu examined. If the engineering menu opens access to many parameters at once, then one entered service code leads to only one, as a rule, function. There are a lot of codes.
over, there are both universal ones (work on most Android smartphones, even a mobile phone), and codes for specific device models. A little later, we will analyze the most popular.
How to access the engineering menu on an Android device. codes
There are two popular ways: using a secret code or using special software. Naturally, the first method is simpler and more reliable, but not without nuances. There is no universal code that will definitely take you to the engineering menu.
One smartphone works on one, another on the other, and the third on the third. However, Android is not the first year, because users have displayed the most popular codes that work on most devices. So:
- ## 3646633 ##. the most common Android engineering menu entry code;
- # 15963 # and ## 4636 ##. if the previous one did not work, try these;
- ## 7378423 ## or ## 3646633 ## or ## 3649547 ##. used on smartphones from Sony;
- ## 3424 ## or ## 8255 ##. pay attention to the owners of HTC devices;
- ## 197328640 ##. in some cases, it works on Samsung;
- 3845 # 855 #. often used to access the engineering menu on LG Android smartphones;
- ## 54298 ##. works on many devices with a MediaTek processor;
- ## 2846579 ## or ## 14789632 ##. and Huawei has its own set of codes.
At least one, but it should work on your device. Simply enter the code using the dialer (the “Phone” application on the desktop). As a rule, even the call button does not need to be pressed (not always). at the end of dialing, the service will automatically start. But not everything is so simple, there are certain difficulties in launching the engineering menu on some Android phones.
- firstly, on many smartphones or tablets with Qualcomm Snapdragon, Intel or Tegra processors, either there is no menu or it is very difficult to access it. In some cases, you can not even try.
- secondly, custom firmware may be the cause of the problems. In some of them, access to configuration tools is simply absent or blocked. For example, you will not find the engineering menu in the CyanogenMod firmware, which is very popular among users. The reason is simple. initially the firmware was developed for devices based on Snapdragon.
- thirdly, the manufacturer himself may act as source of problems, who hid the engineering menu more reliably or decided to remove it altogether. Here we also attribute all sorts of errors, from which not one of the devices is insured.
Actually, solutions to problems lie on the surface. If the smartphone is on Snapdragon, Intel or Tegra, then in most cases nothing will be done. However, on these devices you can also access a number of hidden settings, which we will discuss below.
By the way, on Xiaomi smartphones, which are mostly based on Qualcomm chips, access to the engineering can be obtained by clicking on the “Kernel version” in the smartphone’s settings several times (section “About the phone”). Finally, in some cases, flashing the Android device to the stock (official) firmware will help.
The second way to open access to the engineering menu can be applications. There are quite a lot of them, you can download them for free from Google Play, but almost all are designed for smartphones based on the MediaTek processor.
The MTK Engineering Mode application has proved to be quite good. Hidden Android Settings is a similar application in features. As an example, the “Starting MTK Engineering Menu” can also be offered.
Again, not the fact that each of the programs will work seamlessly on your device. there are a hundred reasons why they will refuse to function. Small companies are developing such tools, so you probably have to try a few.
What can be configured in the engineering menu?
Both the appearance of the interface and the set of settings for the settings may differ for different smartphones. If you take the device on Qualcomm Snapdragon, then often all you can do is look at the information about the various modules and perform some tests.
Make any changes to the settings will not work. But smartphones on MediaTek offer much more features: sound configuration, network settings, various modules, and so on.
So, regardless of the fact that the external interface of the engineering menu may differ on different devices, it will not be difficult to deal with the items. Let’s go through the main features.
Once again: you make the changes at your own risk. Do not change parameter values that you do not know anything about.
Informative features of the Android engineering menu
The first thing that the Android engineering menu offers is to study various information about the device. It mainly relates to the network, wireless interfaces and battery (on smartphones with Snapdragon processors using the command ## 4636 ##). What can be seen in these sections:
- IMEI phone. a special (unique) number that is assigned to each smartphone;
- Phone number. not always indicated;
- Network. indicates the current operator;
- Roaming. whether or not you are;
- Network information. discussed or not, enabled or disabled;
- Call Forwarding. used or not;
- Network type, network index;
- The volume of the signal and your location as coordinates.
- Status: charging or not;
- Charge level (in percent);
- Voltage and temperature;
- The technology by which the element is produced;
- Time since last reboot.
One of the sections allows you to view information about the use of applications on the smartphone (name, last launch date, duration). In addition, a separate section of the engineering menu on Android is dedicated to the Wi-Fi wireless interface. Here you will find information about the status of the connection, the name of the network, you can find out the speed and some other data.
This is only the most relevant information. In some cases, in the engineering menu, you can find more data about the device.
Testing smartphone parameters in the engineering menu
A rather interesting feature of the engineering menu, which allows you to test various parameters of the smartphone. Often it helps to find the source of the problem, due to which the system does not function correctly. What specific tests can be done:
- Complex (Automatic Test). each parameter of the smartphone is tested;
- Report. a test report is provided;
- Testing buttons, memory cards and SIM-cards, vibration, speakers, connectors. all this can be checked for performance;
- Screen tests. for brightness, sensitivity and so on;
- Testing cameras and flash, flashlight, wireless interfaces and sensors (gyroscope, accelerometer and others).
Again, the set of testing options may vary. It all depends on the engineering menu of a specific Android device. Undoubtedly, useful features that are useful to many users. For example, when buying a used smartphone, you can test the screen for performance.
Change settings in the hidden menu of Android
If in the case of testing or studying information about the phone or tablet there is nothing to fear, then you need to make changes carefully.
It’s better not to touch the parameters, the purposes of which you do not know, as well as take screenshots or mark on the leaflet all that you change. If you encounter problems, you can return the options to their default values. Consider here the most interesting sections.
Set up cellular communications (Telephony) and change IMEI
Here are concentrated settings for changing network settings. You are unlikely to be able to disable the smartphone by changing these parameters, but you can disrupt the network search, so remember where to take pictures and where to put checkmarks so that in the future, if anything, put everything back in place.
Typically, changes to this section are made in order to reduce energy consumption.
First, you can remove the selection from the frequencies (subsection Band mode) on which your operator does not work. We find out in which ranges your mobile operator works, uncheck all the others. This will help to slightly reduce energy consumption, since the modem of the smartphone will know exactly what frequencies it is connected to.
In the same subsection, on the contrary, you can include the desired frequencies. This is necessary when the manufacturer from the factory does not activate the necessary for your region. For example, often “out of the box” Chinese smartphones cannot work with LTE. This problem will help solve the service menu on Android.
Secondly, in the subsection Network selecting we can prioritize the networks that are used for access (2G, 3G, 4G). Everything is being done for the same purpose: increasing battery life. As a rule, 3G and / or 4G networks are disabled. Not every region has support for these networks, and the communication module, however, continues to search for them, spending energy. Disconnected. and no problem. In addition, the device will not switch to 3G or 4G, spending traffic.
In subsection Gprs, for us, ordinary users, it’s better not to climb if there is no good reason. Here you can find various settings for the smartphone to work with the network, and there is also an item for changing IMEI.
Attention! There have been precedents for criminal prosecution for illegally changing IMEI numbers. often the punishment is a monetary fine, a suspended sentence. However, there have been cases of real imprisonment.
The IMEI change function may come in handy after an unsuccessful firmware attempt, when the identification number flies. Then you can simply rewrite it from the box in which the device is supplied.
Therefore, here we use only the testing functions, and if you need to make some corrections to return the device to working condition, we carefully study the purpose of each parameter on the Web.
Setting the sound volume in the Android engineering menu (Audio)
Judging by the number of queries in the search, in order to increase the volume, Android users resort to the engineering menu. Everything is quite simple:
- Select the Hardware Testing tab. Audio Select the desired mode;
- Normal Mode. responsible for outputting sound to the main speaker.
- Headset Mode. with its help, the sound volume in the headphones is adjusted.
- LoudSpeaker. includes settings for adjusting sound parameters during speakerphone.
- Headset_LoudSpeaker Mode. allows you to increase or decrease the sound volume for the speakerphone mode with the connected headphones.
- Now, from the drop-down list, select for which device we will adjust the volume in the Android engineering menu;
Sip. options for Internet telephony. Mic. sets the sensitivity of the microphone. Sph (maybe two). setting the spoken speaker. Media. multimedia speaker (main). Finally, the point that is best left untouched is Sid. After the changes, an echo may appear.
- The line “Level” sets the value of the volume level, which is tied to each step (pressing) of the volume rocker. The default is 0. You can not touch it, unless, of course, the sound on your device does not jump abruptly when you press the button.
- The line “Value is” sets the value of each step (volume level);
- The most interesting line is “Max Vol”, with the help of which the maximum volume on Android is increased through the engineering menu.
As a rule, the smartphone manufacturer does not set the maximum value, so we can correct it ourselves. Note that at the highest level, wheezing is observed. To select the most comfortable value, we sort through the options.
Android secret codes
In addition to the engineering menu, you can use secret codes to access various functions. It is also difficult to predict which team will work on your device. Consider the most popular and useful: