Service codes htc. Android engineering menu: detailed instructions for setting up your phone

Have you decided to increase the volume of your smartphone or tablet because the standard does not suit you with the volume of its sound? Even if you have already set all the settings to the maximum for the volume, the system can increase its level a little more, because at the system level it is set, say, at an average value. This practice is inherent in all manufacturers and operating systems, including Android. But keep in mind that at maximum settings, the phone's speaker will soon wheeze, sniffle, and, perhaps, stop working altogether, because. load increases significantly.

Attention! If you decide to change several settings in the engineering menu, we strongly recommend that you create a complete copy of all files on your phone, as well as the menu as it was originally configured. After some changes, the phone may malfunction or not work correctly. For example, there are situations when, during a telephone conversation, you hear not the interlocutor, but yourself or the speaker wheezes after changes in volume and nothing is heard except for this wheezing.

Entering the engineering menu

And so, to work with the volume level, whether it be an increase or decrease, you must first enter the engineering menu. We have considered all the ways how any Android user can do this.

The process of entering this menu is possible through special programs available for download in the Google Play store, or using the following commands that you need to enter in dialing mode:

• Code *#*#54298#*#* - devices based on the MTK processor (first option)
• Code *#*#3646633#*#* - devices based on the MTK processor (second option)
• Code *#*#8255#*#* or *#*#4636#*#* - Samsung devices
• Code *#*#3424#*#* or *#*#4636#*#* or *#*#8255#*#* – HTC smartphones
• Code *#*#7378423#*#* - Sony smartphones
• Code *#*#3646633#*#* - smartphones Fly, Alcatel, Philips
• Code *#*#2846579#*#* - Huawei smartphones

The process of increasing the volume in the engineering menu

Walkthrough:

Also, in addition to the volume level, there are other items in the engineering menu, for example, options for working with headphones, key reprogramming, hands-free mode, various tests of your smartphone, and much more. You can read more about each option on specialized forums, because for each model the engineering menu may differ slightly.

Why rooting an Android device is needed and what opportunities it gives is known to a fairly large number of users, which cannot be said about the hidden advanced menu of hardware settings, also called the engineering menu. Few people know about these settings, and even fewer mobile device owners know how to use them. What is the Android engineering menu and why is it needed?

The Android engineering menu is nothing more than a special subroutine designed for developers to test the operating system and device sensors. The interface of this program is represented by a set of options that allow you to change the hardware configuration of the mobile device. With its help, you can get comprehensive information about the hardware of the gadget, test the processor, RAM and physical flash memory, wireless connection modes, adjust the settings of the camera, display, microphone, speakers, and much more.

Entering the engineering menu

All this, of course, is good, but how to enter the engineering menu if there is no corresponding option in the Android interface? Entering the advanced hardware settings menu is carried out using a special code entered in the line for dialing a telephone number. The menu should open immediately after entering the last character of the combination, but in some cases it may be necessary to press the call button.

There is nothing complicated in the procedure itself, however, it should be borne in mind that there are codes for different models of mobile gadgets. Below we have provided a list of codes for the most popular manufacturers.

The engineering menu codes in Android are universal, however, their correct operation on phones with "left" firmware is not guaranteed. You can also use special programs to access Android hardware settings, for example, "MTK Engineering Menu" or "Mobileuncle MTK Tools".

Such applications are especially useful on tablets, the firmware of which does not provide for the presence of a “dialer”. The interface and the set of available options in these programs are somewhat different, however, it will not be difficult to deal with them.

Whichever method you use, you need to exercise maximum caution when working with the engineering menu. Before starting work, it is strongly recommended to write down all the values ​​of the original parameters in order to be able to restore the settings. Experimenting with the engineering menu just to find out what will come of it is unacceptable, as you can render your device unusable!

To get a list of engineering codes for a specific phone model, you can use a special application Secret Codes available on Google Play. On some models of mobile devices, full access to the engineering menu may require superuser rights (root).

What can be changed using the menu

You know how to get into the engineering menu, now let's find out what settings you can make with it. The possibilities are more than wide. The menu subroutine supports changing the speaker volume and microphone sensitivity, built-in camera settings, audio settings, GPS, Bluetooth and Wi-Fi modules, turning off unused frequencies to save battery power. You can also test key components of your device and an external memory card, adjust I / O operations, determine the exact temperature of the processor and battery, and determine the level of harmful electromagnetic radiation.

Another useful feature is access to the recovery mode - an analogue of the BIOS on computers, which in turn contains a whole set of settings. Recovery Mode features include resetting the device to factory settings, updating the firmware, creating a backup copy of the operating system, gaining root access, deleting sensitive user data. It is not possible to list all the options of the engineering menu within the framework of one article, the more sensors and components in the phone or tablet, the more extensive it will be.

Increase the volume of the phone through the engineering menu

And now we will demonstrate how to work with hardware settings using the example of one of the most popular operations and find out how to increase the volume on Android through the engineering menu. So, go to the menu using Mobileuncle MTK Tools or by entering the “magic” code, then find and open the Audio subsection. If you entered the menu through the Mobileuncle Tools program, this subsection will be located in the Engineer Mode high-order section, in other cases it is usually located on the Hardware Testing tab.

In the Audio subsection, the following options will be available to you:

• Normal Mode - the normal mode that works when a headset is not connected to the device.
• Headset Mode - headset mode, which is activated when headphones or speakers are connected to the smartphone.
• LoudSpeaker Mode - loudspeaker mode. Activated when the speakerphone is turned on, provided that a headset is not connected to the device.
• Headset_LoudSpeaker Mode - loudspeaker mode with a connected headset. The same as the previous one, but with headphones or speakers connected.
• Speech Enhancement - this mode is activated when talking on the phone without using the speakerphone.

There may be other settings in the section, for example, Debug Info and Speech Logger, but it's better not to touch them. Select the mode for which you want to change the volume level (let it be Normal Mode), select Type in the list that opens and indicate for which function we will change the volume. The following functions may be available:

• Ring - volume setting for incoming calls;
• Media - adjust the volume of the speakers when playing multimedia;
• Sip - sound settings for Internet calls;
• Sph - sound settings of the conversational speaker;
• Sph2 - sound settings of the second conversational speaker (option may not be available);
• Mic - change the sensitivity of the microphone;
• FMR - FM radio volume settings;
• Sid - it is better not to touch this parameter, otherwise there may be problems with the voice of the interlocutor.

Having selected a function, scroll through the current list, set the desired Value (from 0 to 255) and click to apply the new Set settings.

To change the volume level, you can also use the preset templates - the Level option. Most phones have seven levels, from 0 to 6. It is advisable not to touch the Max Vol setting, just as you should not set too high values ​​for Value, otherwise the sound in the speakers will begin to wheeze. Other modes are configured in the same way in the Audio subsection.

Some models of smartphones and tablets require a reboot for the new settings to take effect.

Reset

And the last thing we'll look at today is resetting the engineering menu settings to factory defaults. It may be needed if, after making changes, the device began to work incorrectly. There are several ways to reset. If the system boots normally, go to the settings and open the "Recovery and Reset" subsection.

You can also reset the engineering menu by entering a special service code in the “dialer”. This is usually *2767*3855#, *#*#7780#*#* or *#*#7378423#*#*, but your phone model may require a different code.

Another option is to use the recovery mode, which was mentioned above. To get into it, use one of these combinations:

• Power button + volume down.
• Power button + volume up.
• Power button + Home button + volume up/down.
• Power button + volume up + volume down.

In the list of options that opens, select "wipe data / factory reset" → "Yes - delete all user data" → "reboot system now". The device will reboot and the settings will be reset.

There is another way to reset the engineering menu settings, but it requires superuser rights. Using any root-enabled file manager, navigate to the root directory of the system, and then delete all or part of the contents of the folder data/nvram/apcfg/aprdcl and reboot.

Files in a folder aprdcl just responsible for the settings of the engineering menu. It is not necessary to delete all files at once. If you screwed up, say, with the audio settings, to restore the original settings, it is enough to delete the files that have the audio string element in their names. And one moment. Regardless of how you reset it, always back up your personal data and apps as they can all be lost.

Probably, many smartphone owners have faced the volume problem. For example, two things did not suit me. The first is a quiet speaker sound when an incoming call, and the second is a very loud sound in the headphones when an incoming call.

A little about how Android controls volume

If no headset is connected to your gadget (headphones, hands-free, etc.), then the volume settings will be the same, and as soon as you connect the headset, the settings will be different. For a general understanding, I will give a few examples.

Example 1 You listen to music on your phone, turn on the loud speaker at full volume, and when you connect a headset to it and turn on the loud speaker again, the volume may differ (it may be louder or lower, depending on which phone model or firmware version).

Example 2 You are watching a movie in headphones, the volume (meaning the volume of multimedia) is set to 40% and then after a while you have an incoming call, then the volume in the headphones will change to the general volume, in which case you can get a powerful sonic shock to the ears. Believe me, I have been blown up from the couch more than once in such cases, the fact is that the programmers have poorly adjusted the volume modes.

Example 3 You are on a phone call and need to switch to speakerphone mode, and you notice that the speaker is not as loud (or vice versa) as when listening to music; or the partner began to hear you badly, this is because in different modes the microphone may have different sensitivity. Also, when you connect a headset in the same situation and turn on the speakerphone mode, the settings are different again. This is how Android manages volume.

We learn the theory of the engineering menu

So let's look at what and how can be done if you play a little trick on the "Engineering Menu".

Before making any changes, we recommend that you read the article in full, and comprehend, and then experiment. Also take a piece of paper and write down all the default values ​​in case something goes wrong. You can start the engineering menu using the telephone dialing: we prescribe the following combinations on it (Fig. 1):

picture 1

*#*#54298#*#* or *#*#3646633#*#* or *#*#83781#*#* - smartphones based on the MTK processor

*#*#8255#*#* or *#*#4636#*#* – Samsung smartphones

*#*#3424#*#* or *#*#4636#*#* or *#*#8255#*#* – HTC smartphones

*#*#7378423#*#* - Sony smartphones

*#*#3646633#*#* – Fly, Alcatel, Philips smartphones

*#*#2846579#*#* – Huawei smartphones

Congratulations, you have entered the engineering menu (Fig. 2). Keep in mind that the menu on different phones may differ slightly in structure. We find the section "Audio" and go into it. After entering, we see a bunch of unknown lines (modes) (Fig. 3). Here's what these modes mean in Android:

figure 2 figure 3

— normal mode(settings section in normal or normal mode) – this mode is active when nothing is connected to the smartphone;

— Headset mode(headset mode) - this mode is activated after connecting headphones or external speakers;

— Loud Speaker Mode(loudspeaker mode) - it is activated when nothing is connected to the smart, and you turn on the speakerphone while talking on the phone;

— Headset_LoudSpeaker Mode(loudspeaker mode when a headset is connected) - this mode is activated when headphones or external speakers are connected to the smart phone, and you turn on the speakerphone while talking on the phone;

— Speech enhancement(Talking mode) - this mode is activated in the normal talking mode on the phone, and nothing is connected to it (headset, external speakers) and the speakerphone is not turned on.

It’s better not to poke your nose into the last three sections:

— debug info- it is not clear why - info on the backup of information or its debugging;

— Speech logger- I didn’t fully understand, most likely, keeping a log during negotiations or recording chatter. If you check the box next to "Enable speech log", then after the end of the phone call, the corresponding files are created in the root directory of the memory card. Their name and structure takes the following form: Wed_Jun_2014__07_02_23.vm (Wednesday_July_2014__time07_02_23.vm).

What these files serve for and how they can be useful to us is not clear. The directory /sdcard/VOIP_DebugInfo (which is the location for storing files with information on the backup) is not automatically created, if you create it manually, then after the conversation it will remain empty.

— audio logger- good sound recording software that supports quick search, playback and saving.

If you approach these modes wisely, you can adjust the volume of Android smartphones or tablets the way you want. When entering any of the modes, various volume settings (Type) will become available to your gaze. Here is a list of the main settings you need to know (Fig. 4):

figure 4

—Sip– settings for Internet calls;

— Mic– microphone sensitivity settings;

— Sph- settings for the conversational speaker (the one that is applied to the ears);

— Sph2- settings for the second conversational speaker (I don’t have it);

— sid- we skip, when you change these parameters during negotiations on your smartphone or tablet, you can hear yourself instead of the interlocutor;

— media– setting the multimedia volume level;

— ring– setting the volume level of the incoming call;

— FMR– FM radio volume settings.

Further, under the item for selecting settings, we have a list of volume levels (Level) (Fig. 5). For a better understanding, there are 7 such levels, from level 0 to level 6. Each level corresponds to one “click” on the volume rocker of a smartphone or tablet. Accordingly, level 0 is the quietest level, and level 6 is the loudest signal level. Each level can be assigned its own values, which are in the Value is 0~255 cell, and should not go beyond the range from 0 to 255 (the lower the value, the lower the sound). To do this, you need to erase the old value in the cell, then enter the new (desired) value and press the “Set” button (the one next to the cell) to assign (Fig. 6). Be careful when using the maximum values, as the speakers may produce uncharacteristically unpleasant sounds in the form of rattling and other unpleasant effects.

figure 5 figure 6

A warning! Before making changes, overwrite all factory values ​​(in case something goes wrong).

You must know!

Editing modes in the engineering menu

Example 1 How to increase the volume of an incoming call?

To do this, you need to go to the engineering menu, print the "Audio" section, go to the "LoudSpeaker Mode" mode and select "Ring" in the volume settings - the volume settings for the incoming call. Then sequentially change (increase) the values ​​of all signal levels (level 0 - level 6). Also, for greater effect, you can increase the value of the Max Vol section. 0 ~ 160, if it is not the maximum (I set mine to 155, with a larger value, the speaker starts to “wheeze”).

Example 2 How to increase the volume when talking on the phone? (Increasing the volume level of a small speaker, the one that is applied to the ear).

Again we go into the engineering menu already known to us, print the “Audio” section, go to the special “Normal Mode”, select Sph in it - this parameter is responsible for changing the value of all signal levels in the range from level 0 to level 6. Set the one you need for us level. In the Max Vol. 0~160, can also be changed to a higher volume power setting.

Example 3 Increasing the volume and sensitivity of the smartphone's conversational microphone

To adjust and set the required volume level and also the sensitivity of the conversational microphone, you need to go to the “Engineering menu”> “Audio”> “Normal Mode”> select Mic - microphone sensitivity settings, and for all levels (level 0 - level 6) we assign one and the same value, for example 240. Now the interlocutor should hear you better.

Example 4 How to increase the sound recording volume while recording a video?

Suppose there is a need to increase the sound recording volume level during video shooting, then in the engineering menu for our loudspeaker (LoudSpeaker Mode) change the microphone sensitivity settings (mic), increase all values ​​at all levels (level 0 - level 6), for example set to 240 at every level. I remind you of pressing the button (set) - we reboot our favorite gadget and rejoice.

By the way, do not forget to press the “Set” button after each editing of a certain parameter. This action should commit and accept your command for execution. Otherwise, the user-set parameters are not activated. In addition, a certain number of mobile devices require a reboot for the changes to take effect (turn off and on the device).

Good luck with your experiments, if something is not clear - write in the comments. We are waiting for your answers.

Table of codes for entering the engineering menu

Note: table is constantly updated

The engineering menu provides access to manual configuration of the "iron" part of the smartphone. To enter, you need to enter a special code or install an application, but there are a number of features that you should pay close attention to. If you could not enter the engineering menu the first time, then you did not take into account the features of the device. It should immediately be clarified that any intervention in the operation of the device can lead to its inoperability and loss of warranty.

Hidden system features

At the last stages of smartphone setup, developers test the system for errors and check the operation of all device sensors. Especially for this, a special subroutine is sewn into Android - the engineering menu, which provides access to the hidden settings of the Android OS and allows you to reconfigure them yourself. In addition, the menu contains detailed information about the device. The full list of menu options is known only to platform developers, so you should make your changes with caution.

Secret paths of developers

To enter the engineering menu, dial the code *#*#3646633#*#*. On some models, you additionally need to press the call key. It is worth considering the features of phones: for different brands there are different combinations of numbers. The Android version does not affect the functionality of the engineering menu.

We enter a special code to enter the engineering menu

If there are no problems, then you will be taken to an additional menu for fine-tuning your smartphone.

Enter the menu subsection

Depending on the system version and processor model, the engineering menu may be incomplete or missing. In the photo above, a menu subsection with elements for testing smartphone sensors, setting up a USB connection, performing internal and external memory tests.

If it didn't work the first time

Not on all devices it is possible to enter the engineering menu. Let's look at some common problems and how to fix them.

Android is a complex Unix-based operating system. If something cannot be done, you have not taken into account all the nuances of the functioning of a particular subroutine.

List of special codes

One of the common reasons for blocking the entrance to the engineering menu is the wrong special code. The combination of numbers depends not only on the device model, but also on the type of processor. For example, most devices based on the MTK chip are equipped with an engineering menu. If we talk about Qualcomm, not all smartphones based on this platform have an engineering menu. The list of combinations is given in the table. If you don't like the one you want, try another combination.

Table: code options for different Android models

DIY engineering menu

If none of the special codes fit, don't get upset. There are many applications on the network with the functionality of the engineering menu. It is worth noting that the postscript MTK in the names speaks eloquently of compatibility only with MediaTek processors.

The first option is Mobileuncle MTK Tools. In addition to the necessary set of settings, this program has several additional functions: firmware update, recovery update, GPS receiver improvement mode, and much more.

Mobileuncle MTK Tools provides a set of settings

Another program is MTK Engineering Mode. The program completely repeats the regular engineering menu.

MTK Engineering Mode repeats the regular engineering menu

For those whose device is not equipped with an engineering menu, there is another option: installing third-party firmware. Third-party builds very often have a wide range of customization options.

Where to begin

When you first enter the menu, you can get lost in the wilds of parameters.

Engineering menu settings

Settings open up huge possibilities for users.

Depending on the hardware platform, some items may not be available or may be missing.

In this section, you can configure the mobile communication settings.

1. Auto Answer. Enable/disable automatic answer to an incoming call.
2. band mode. Allows you to manually select the frequency range for the operation of the GSM module. You will see all technologies and frequencies for them supported by your smartphone model. If you wish, you can uncheck the ranges that are not used by your carrier. This will significantly save battery power. To save the settings, press the set button.
3. CFU Setting (Call forwarding Settings). This option enables or disables conditional forwarding. It must be supported by the operator.
4. AT Command Tool. A developer utility that supports AT commands. This menu item will be of interest to programmers and developers. Using this menu, you can perform various queries directly on the system without visual add-ons.
5. modem test. Setting the compatibility of the "access point" option with different types of connected devices.
6. network selection. Here you can select mobile communication standards (GSM, WCDMA, LTE). For additional energy saving, disable unused ones.
7. NetworkInfo. Select one or more options to display information about the status of cellular communication parameters. After selecting, open the additional menu (three dots on the right in the upper corner) and click Check Information. This option is convenient for checking the quality of services of a mobile operator.
8. GPRS. Setting up a connection to the mobile Internet, selecting an active SIM card (if there are several).
9. HSPA info. Information about the 3G network if supported by your mobile operator.
10. Mobile data service preferred. The Internet will be prioritized over voice traffic to increase the data transfer rate. Incoming calls may not go through.
11. Fast dormancy. Allows you to save battery power in third-generation networks. The option must be supported by the carrier.
12. RAT Mode (Phone Info). Allows you to select the preferred communication standard. You should change the parameter carefully, it blocks the settings of the Network Selecting item.
13. RF De-sense Test. You can select a frequency range and a specific channel to check the quality of communication.
14. SIM ME Lock. This subsection allows you to configure the regional parameters of the GSM module (MNC, NCC) in manual mode.

Photo gallery: mobile communication options

We get to the main window of the subsection Turn on or turn off auto-answer Turn on or turn off conditional forwarding Set up the “Modem” mode Display information from the GSM module Set up mobile Internet Select the priority of the connection type Set up the operation of 3G mode Select the type of mobile connection Check the network power Set up regional communication parameters

Wireless interfaces

The section is intended for testing wireless data transmission modules (Wi-Fi, Bluetooth, FM).

1. bluetooth. A wide range of settings and tests for the module of the same name in order to check the reception and transmission of data, start the debug mode.
2. CDS Information. Information about the parameters of wireless interfaces.
3. FM receiver. Checking the FM module of the device.
4. WiFi. Testing the module for transmitting and receiving information on the specified frequency channel.
5. WiFi CTIA. Recording logs of wireless technology tests.

Photo gallery: wireless data transmission

Select the section for checking the device's wireless modules Check the bluetooth operation mode Find information about wireless interfaces Set up the FM module Check the WiFi module operation Write the WiFi module test data to the log file

1. Audio - fine-tuning the sound playback parameters.
2. Camera - a set of options for taking photos and videos that are not included in the Camera application.
3. Driving Current Camera - takes current readings from the sensor in the camera circuit.
4. CPU Stress Test - execution of tests of all subsystems of the central processor.
5. Deep Idle Setting - disable sleep mode in standby mode.
6. Sleep Mode Setting - sleep mode settings.
7. ChargeBattery - view information about the battery.
8. Sensor - sensor calibration.
9. Multi-Touch - checks the number of available points for simultaneous touching the screen.
10. Location Engineer Mode - checking the parameters of the GPS module.

Photo gallery: equipment testing

We go to the section for checking electronic components Adjust the volume of the earpieces Adjust the power supply of the camera Adjust the standby mode Adjust the frequency of the central processor Adjust the sleep mode View information about the battery Adjust the touch screen Check the capabilities of the multi-touch function Configure the GPS module

Adjusting the speaker volume

In the subsection, you can adjust the overall volume level, the volume of the headphones and the speakerphone.

Changes in volume settings should be treated carefully. All parameters are individual for a specific device model. Incorrect configuration may result in poor hearing performance.

There are a number of general options:

1. MaxVol - the overall volume level. The range of values ​​is from 0 to 160. The larger the number, the louder the volume.
2. Sph - volume during a telephone conversation.
3. Mic - microphone sensitivity.
4. Ring - speaker volume for an incoming call.
5. Media - volume level when watching movies, listening to music and playing games.

Very often, users are unhappy with the volume of the speaker during a conversation. To improve audibility, go to the Normal Mode menu and change the Sph parameter to 150. If the phone rings quietly when an incoming call, then you need to increase the value of the Ring parameter. We advise you not to set a value higher than 200, this can lead to speaker failure. To hear you better, change the Mic parameter from 100 to 172. This will increase the speaker's sensitivity.

ROOT - a panacea for a smartphone

On a smartphone without root rights, the functionality of the engineering menu is limited: some items are not displayed, the changes made are not saved. Any interference with the operation of the smartphone requires open access to the system. Do not forget that getting root access can harm your gadget, the warranty on the device is void. We strongly recommend that you back up important information to a memory card and synchronize with your google account and remove it to avoid data loss. To unlock full access to the system, you can use one of the existing methods.

Installing the application directly on the device (KingRoot)

Superuser access can be opened from a smartphone using special programs. Consider the sequence of operations on the example of the KingRoot program:

After that, you can safely change the parameters in the engineering menu, all changes will be saved. If the result is negative, move on to the next method.

Obtaining superuser rights via PC (Kingo Root)

This method differs in a slightly larger number of preparatory activities:

The engineering menu is used to configure the device and test the hardware. This is a built-in subroutine of the system, which is an indispensable tool for both experienced users and beginners in the world of mobile devices. However, it should be noted that manipulations with the engineering menu can render the gadget inoperable.

The Android operating system for mobile devices is becoming increasingly popular in the world and is constantly being improved. HTC has also released several models of its smartphones based on this OS, and their number will continue to grow. As for other phone models based on a variety of platforms, there are special service codes for the Android HTC that allow you to get information about the communicator or change its settings.

The following is a non-exhaustive list of service "secret" codes for Android-based NTS with a brief explanation of each of them.

Use these utility commands carefully and only when absolutely necessary. No wonder they are called "secret" and are intended for a narrow circle of service center specialists. Incorrect handling or erroneous input of such a command can corrupt the data stored on the smartphone, disable any hardware module, or reset the settings to factory settings without the possibility of canceling the operation.

Use service codes for HTC Android at your own peril and risk, and best of all, seek help from a specialist.