The function of displaying the caller's number is one of the basic capabilities of any mobile network, ensuring the safety and comfort of the user. However, in certain situations it becomes necessary to hide your number from the subscriber you are calling, or completely disable the transfer of this data at the operator level. Smartphone owners are faced with this task for various reasons: from the desire to maintain anonymity to solving problems with incorrect display of contacts in the address book. The process of deactivating this option on managed devices Android may vary depending on the gadget model, operating system version and the conditions of your mobile operator.
In this material we will analyze in detail all existing methods of hiding the subscriber ID. You will learn how to change settings directly in the phone menu, what universal codes can be used to instantly manage the service, and in which cases you will need to contact your communication provider's support service. It's important to understand that some methods only affect one specific call, while others change the settings permanently until you enable the feature again. Please review each section carefullyto choose the best option for your situation and avoid unexpected call blocking.
Settings of the “Phone” application in the Android interface
The easiest and most accessible way to hide your number is to use the built-in settings of the application for making calls. The interface may differ slightly on smartphones of different brands, such as Samsung, Xiaomi or Google Pixel, but the logic for searching for the desired parameter remains the same. You need to open the standard application Phone, click on the menu icon (usually three dots in the corner of the screen) and go to the settings section. Here you should look for an item related to additional services or call parameters.
In the menu that opens, find the section Additional settings or Advanced settings. This is where the subscriber ID management option is hidden. The system will offer you three options: show the number, hide it, or use the default network settings. Selecting the item Hide number activates the anonymity mode for all outgoing calls. If you select the “Show number” option, then your identifier will be visible to all interlocutors, regardless of their personal privacy settings.
It is worth noting that on some firmware, for example, shell MIUI or One UI, the path to this setting may be a little longer. Sometimes you need to go into the SIM card settings separately for each slot if the device uses two SIM cards. In this case, the parameter must be changed for each active communication line individually. If you do not find the corresponding switch in the phone menu, this may mean that your mobile operator has blocked the ability to change this setting through the device interface.
If the switch in the phone settings is inactive (gray), this means that managing the service is only possible through USSD requests or the operator's personal account.
Usage USSD requests for service management
A universal method that works on the vast majority of mobile devices and all telecom operators is the use of special USSD codes. These commands are processed directly on the network side, so the result of their execution does not depend on your smartphone model or version Android. To disable the transmission of a number, the code most often used is #31#, which must be dialed in the dialing field and press the call button. The system will instantly process the request and confirm activation of the number hiding service.
However, different mobile operators may have their own specific codes to manage this function. For example, some providers use the combination *31*1#to enable anonymity, and *31*0#to disable it. In other cases, you may need to enter a code *67# before the subscriber number for one-time hiding. To find out the exact combination for your tariff plan, it is best to refer to the operator’s official reference materials or check the information in your personal account. This ensures that the command is received correctly by the network.
If you are in an area with poor reception or roaming, the command may not be executed the first time. In this case, try reconnecting to the network or restarting the device. After successfully completing the request, you will receive a pop-up notification on the screen that the service is activated or deactivated. Save the screenshot this notification, so that in case of disputes you have proof of changing the settings.
☑️ Checking the operation of USSD codes
Settings through the personal account of the telecom operator
Modern mobile operators provide users with ample opportunities to manage services through personal accounts on the website or in branded applications. This method is the most reliable, as it allows you to visually monitor the status of all connected options. By going to the service or tariff management section, you can find the item responsible for displaying the number. Here you can not only disable the function, but also set up exceptions, for example, allowing the number to be displayed only for contacts from your address book.
Using your personal account is especially important if the standard phone settings and USSD codes do not bring the desired result. Sometimes operators block changes to certain parameters through the device menu to prevent accidental user errors. In the web interface, changes take effect almost instantly, but in rare cases it may take several minutes for the data to update online. Also, through your personal account, you can check whether you have any paid subscription that forcibly broadcasts your number.
⚠️ Attention: The interfaces of personal accounts and mobile applications of operators are regularly updated. The location of menu items may change, so if you do not find the option you need right away, use the site search or the help section.
Another advantage of this method is the ability to manage services for all numbers associated with your account from one device. This is convenient for family plans or corporate clients who want to centrally configure communication settings. If you have difficulty finding the required setting in your personal account, the operator's support service will be able to provide up-to-date instructions or fulfill the request for you via online chat.
Hide the number for one-time calls
Sometimes a user needs to hide his ID not permanently, but only for one specific call. This may be necessary when calling customer service, selling an item on a message board, or when contacting a stranger. To implement this task, you do not need to change the global settings of your phone. It is enough to use a special prefix before the dialed subscriber number. In most GSM networks, a code is used for this. The process of making an anonymous call is as follows: you open the application #31#.
The process of making an anonymous call is as follows: you open the application Telephone, enter the prefix #31#, and then immediately dial the subscriber’s number without spaces. For example, if you need to call the number +79001234567, the complete dialing sequence will look like #31#79001234567. You then press the call button and the network treats the call as anonymous, hiding your number for that specific connection only. All subsequent calls will be made as usual with the number displayed.
This method is convenient for its flexibility and the absence of the need to return the settings back after the call. However, it is worth considering that some subscribers have set their phones to automatically reject calls from hidden numbers. In this case, your call simply will not go through, and the interlocutor will not even see the fact of trying to dial. Therefore, use the one-time number hiding function wisely, especially if you expect a mandatory response from the recipient.
What does the subscriber see when the number is hidden?
Instead of your number, the message “Unknown number”, “Hidden number” or “Anonymous subscriber” will be displayed on the screen of the interlocutor’s phone, depending on the model of his device and settings operator.
Reasons why the number may be forced to be displayed
Even after following all the instructions to disable caller ID, you may encounter a situation where your identifier is still displayed to the interlocutor. This may be caused by a number of technical and organizational factors. Firstly, some tariff plans, especially corporate or special promotional tariffs, have strictly defined conditions prohibiting number hiding. In this case, changing the settings on the phone is ignored by the operator's equipment.
Secondly, the reason may be incorrect operation of the network settings or outdated smartphone software. If your device has not received security updates or system patches for a long time, it may incorrectly send signals to the network about the desire to hide the number. Problems may also arise when using non-original firmware or after receiving root accesswhen the system files responsible for communication have been modified.
| Cause | Probability | Method solutions |
|---|---|---|
| Tariff restrictions | High | Contacting operator support |
| Network settings failure | Medium | Reset network settings or reboot |
| Outdated software version | Medium | Android system update |
| Application conflict | Low | Delete third-party phone applications |
The third common reason is a conflict between the phone settings and the SIM card settings. Sometimes the operator maintains priority of its settings over the local settings of the device. In such a situation, the only way out is direct contact with the telecom operator to force the shutdown of the service at the network level. Do not try to endlessly change settings in the phone menu if the reason lies deeper - this will not bring results and will only waste your time.
If the phone settings do not help, the problem is almost certainly on the side of the telecom operator or tariff plan.
Third-party applications for managing calls
In the store Google Play there are many applications that position themselves as tools for advanced call management and privacy. They promise to provide features not available in the stock Android interface, including flexible caller ID control. However, you should approach the use of such software with great caution. Most of these applications are just a wrapper over standard system calls and cannot bypass the restrictions imposed by the telecom operator.
Some advanced utilities actually allow you to create lists of contacts for which the number will be shown or hidden automatically. This is implemented through automatic substitution of prefixes before the call, which we mentioned earlier. However, installing a third-party application requires providing broad access to your contacts, call history and microphone. Data security in such cases it often remains in question, since it is not known how the developers manage the information received.
⚠️ Attention: Avoid installing applications with questionable feedback or requiring excessive permissions. Attackers can use such apps to intercept your calls or collect personal information.
If you still decide to use a third-party solution, choose only proven products from well-known developers with high ratings and a large number of installations. Before installation, carefully review the “Permissions” section in the application description. Remember that no application will be able to hide your number if this service is blocked at the level of your mobile operator. In most cases, built-in tools Android are quite sufficient to solve the problem of anonymity.
Why do applications ask for access to contacts?
For automatic spam detection and prefix substitution functions to work, applications need access to your address book in order to check numbers and apply anonymity rules.
The influence of the roaming mode on number display
Particular attention should be paid to the situation when you are abroad and use roaming services. In international roaming, the rules for displaying numbers may differ radically from those in force in your home region. Interaction protocols between different telecom operators do not always guarantee the correct transmission of the “hide number” flag. Even if you have activated this function on your phone, in another country your number may be displayed to the interlocutor without fail.
This is due to the technical features of routing calls through the gateways of different operators. Some foreign networks simply ignore requests to hide the identifier from foreign subscribers for security reasons or due to local legislation. In addition, the cost of roaming services may depend on the type of call being made, and an attempt to hide a number sometimes results in a connection error or additional charges.
Before traveling abroad, it is strongly recommended that you check with your operator about the terms and conditions of the roaming number hiding service. In some cases, it is necessary to activate a special option or send a special request before departure. If anonymity is critical for you when traveling, consider using Internet instant messengers or purchasing a local SIM card, where you can configure communication settings according to local rules.
When roaming, to ensure that your number is hidden, it is often more effective to use Internet calls via Wi-Fi, since they do not depend on the cellular network settings of the host country.
Frequently asked questions (FAQ)
Will my number be hidden if I call emergency services?
No, when calling emergency services (112, 101, 102, 103, 104), your number is always displayed to the dispatcher, regardless of privacy settings. This is necessary to quickly determine the location of the subscriber and communicate with him in the event of a connection failure.
Can the other person find out my number if it is hidden?
A regular user will not be able to see your number. However, law enforcement agencies and special services, upon request from the telecom operator, can obtain information about which number the call was made from, even if it was hidden. Complete anonymity on a cellular network is impossible.
Why did the number become visible again after resetting the phone settings?
When performing a full reset (Hard Reset), all phone parameters return to factory settings. The default number display feature is usually set to "Show" or "Default". You need to go through the deactivation procedure again in the settings or through the USSD code.
Does hiding a number affect the cost of a call?
In most tariff plans, the service of hiding a number is free and does not affect the cost of a minute of conversation. However, some outdated or specific plans may require a subscription fee for this option. It is recommended to check the terms of your tariff in your personal account.
What to do if the subscriber does not receive calls from hidden numbers?
Many users install anti-spam applications on their phones or activate the “Reject hidden numbers” function. In this case, your call will be automatically rejected. The only way to get through is to temporarily disable hiding the number and make a call as usual.