In today's digital world, privacy is becoming an increasingly valuable resource. Every day we make many calls: from business negotiations to calling a courier or making an appointment with a doctor. However, we don’t always want our personal phone number to be displayed on the screen of our interlocutor. Hiding Caller ID is a standard feature available on almost any device running an operating system. It allows you to protect your privacy from annoying callbacks or simply maintain anonymity when resolving sensitive issues. Android. It allows you to protect your privacy from annoying callbacks or simply maintain anonymity when resolving sensitive issues.
The process of activating this option may vary depending on the manufacturer of your gadget, the firmware version and even the conditions of a specific mobile operator. In some cases, the function is built directly into the dialer interface, in others it requires the use of special commands or contacting support. Understanding all the available methods will give you complete control over who sees your contact information. Below we will examine in detail how to hide a number on Android various methods so that you can choose the most convenient one for your situation.
It is worth noting right away that completely hiding a number is not a tool for illegal actions. Telecom operators retain information about who called whom, even if the recipient's screen displays "Unknown number" or "Anonymous." This function is intended solely for user comfort and filtering incoming calls from the interlocutor. Let's move on to the practical implementation of the settings.
Setting through the phone system menu
The simplest and most obvious way to make your number invisible to the interlocutor is to use the built-in settings of the “Phone” application. The developers Android provide this feature in the basic system configuration, although the path to the required switch may differ on different shells. For example, on “pure” Android (like Google Pixel or Motorola), the menu looks different than on Samsung devices with One UI or Xiaomi with MIUI. However, the logic remains the same: you need to find the section responsible for additional call parameters.
First, open the standard dialing application, which usually has a green icon with a handset. In the upper right corner of the screen you will see three vertical dots or a gear icon - this is the entrance to the settings menu. By clicking on it, scroll through the list of options to “Advanced settings” or “Call settings”. This is where the key parameter that controls the display of your ID is hidden. The system may ask you to confirm the action, since changing this parameter affects all outgoing calls.
Inside the section you will find an option called “Phone Number”, “Caller ID” or “Caller ID”. When you click on it, the system will offer three behavior options: “Show number”, “Hide number” and “Default network”. Selecting a mode “Hide number” activates anonymity for all subsequent calls. If you select "Default Network", the phone will use the settings specified by your carrier, which most often involve displaying the number. This method is convenient because it does not require memorizing codes and works automatically after one-time setup.
⚠️ Attention: On some devices provided by telecom operators (branded smartphones), this menu item may be blocked or absent. In this case, changing the settings is only possible through USSD commands or the operator’s personal account.
☑️ Checking the Caller ID settings
Using USSD codes to manage the identifier
If the menu of your smartphone does not have the required switch or it is inactive, universal USSD requests come to the rescue. These are special commands that are sent directly to the mobile operator’s server, bypassing the settings of the device itself. This method is the most reliable, since control occurs at the network level. The commands are standardized for most operators in the CIS countries and Europe, which makes them applicable to owners of devices of any brand, be it Sony, LG or Asus.
To temporarily or permanently hide a number, use the code #31#. However, simply entering it into the dialer is not enough - you need to add the number of the subscriber you are calling. The command format looks like this: you dial #31#, then immediately enter the recipient's phone number without spaces and press the call button. For example, if you need to call +79991234567 anonymously, you enter #31#79991234567. This method is ideal for one-time calls when you do not want to change global phone settings.
There are also commands for completely blocking and unblocking the transfer of a number on a permanent basis. The command #31# (without adding a number and pressing the call button) is often used to check the status, but to activate hiding you may need a code *31# or a specific combination depending on the operator. To cancel hiding and return to displaying the number, you usually use the code #31# in combination with certain prefixes, or an unlock command *31#. It is better to check the exact syntax with your provider, since the interpretation of the codes may differ slightly.
- 📞 For a one-time anonymous call, dial
#31#and immediately the subscriber's number. - 🔒 To permanently block a number, use the hide activation command (depending on the operator).
- 🔓 To cancel hiding and displaying the number, use the unlock command.
- ❓ To check the current status of the service, dial the status request service code.
If you see an error message or “code not supported,” this means that your operator requires connecting the service through your personal account or prohibits completely hiding the number for security reasons. In rare cases, the command may not work correctly when roaming.
What to do if the code does not work?
If the USSD command returns an error, try rebooting the device and trying again. Also make sure you have funds in your account, as some operators consider requesting service changes to be a chargeable action. If the problem persists, the only option is to call technical support.
Comparison of methods for hiding a number
The choice of method for hiding a number depends on your goals: do you need anonymity on an ongoing basis or only for a specific call? Each method has its own advantages and disadvantages. System settings are convenient because once you configure them, you can forget about the problem. USSD codes provide flexibility, allowing you to turn anonymity on and off on the fly without digging deep into the menu. Operator services, in turn, often provide advanced functionality, for example, the ability to hide a number only for certain groups of contacts.
Below is a table that will help you quickly navigate the differences between methods and choose the best option for your use case. Pay attention to the “Complexity” column, which reflects the number of actions required to activate the function.
| Method | Action type | Convenience | Depending on the model |
|---|---|---|---|
| Phone settings | Constant | High | High (the menu is different) |
| USSD code (#31#) | One-time | Average | Low (universal) |
| Applications | Variable | Low | Medium (access required) |
| Operator service | Fixed/Flexible | High | No (depends on tariff) |
The use of third-party applications for calls, such as Skype or specialized VoIP services, also allows you to hide the real number, replacing it with a virtual one. However, this is no longer exactly “hiding” your SIM card, but using an alternative communication channel. Such solutions are often paid and require a stable Internet connection, which can be critical in conditions of poor network coverage.
System settings are suitable for permanent hiding, and USSD codes are the best choice for one-time anonymous calls without changing the phone configuration.
Features of working on different versions of Android
Operating system interface Android undergoes significant changes with each major update. What worked on Android 10 may be moved or renamed to Android 13 or 14. Smartphone manufacturers are also making their own adjustments by creating unique skins. For example, owners of Samsung devices can find the identifier setting in the section Settings → Applications → Phone → Additional settings, while on Xiaomi the path may lie through Settings → System applications → Phone → Operator settings.
On older versions of the system, the menu was flatter and more intuitive. In new versions, Google strives to unify the interface, but due to the fragmentation of the market, a single standard does not yet exist. If you can't find the item you need, use the search inside your phone settings. Enter the phrase “Caller ID” or “phone number” into the search bar, and the system itself will highlight the desired section. This saves time and eliminates the need to manually study all menu sub-items.
It is worth considering that on some custom firmware (for example, LineageOS or Pixel Experience) the menu logic may fully correspond to stock Android. In such cases, look for the “Special” section. Features" or "More" within the phone application. If you updated your phone to the latest version and the settings “disappeared,” most likely they were moved to another subsection rather than deleted. Always check that the menu location is up to date after major software updates.
⚠️ Attention: Settings interfaces may change with firmware updates. If the described path does not match yours, use the settings search or refer to the help for your specific phone model.
Restrictions on the part of the telecom operator
Even if you have perfectly set up your phone and entered the correct USSD codes, the final decision on whether your number will be visible is made by the mobile operator. In some countries and with certain providers, the number hiding service may be paid or not available to individuals at all without concluding a special agreement. This is due to legal requirements on subscriber identification and the fight against telephone fraud.
In addition, there are categories of numbers that are technically impossible to hide. These include short service numbers, emergency numbers (112, 102, 103) and some corporate lines. When calling such numbers, your ID will be transmitted without fail, regardless of your phone settings. Operators can also block anonymous calls for subscribers who have the Anti-AON service activated - in this case, your call simply will not go through, and the interlocutor will see a notification that the call was rejected due to a hidden number.
Some tariff plans include the Caller ID management function as part of the package. In your operator’s personal account, you can find the “Services” or “Tariff Settings” section, where you can activate or deactivate number transfer. This is the most reliable method, since the setting is applied on the network side and does not depend on which phone you are currently using. If you change the device, the setting will remain with your SIM card.
- 🚫 Emergency services always see your number, it is impossible to hide it.
- 💰 For some operators, the service of hiding the number may be paid.
- 🛡️ Anti-AON service with the interlocutor can block your anonymous calls.
- 📱 Setting up through the operator is valid for any SIM card in any phone.
If you have problems with displaying the number, when the settings are enabled, but the subscriber still sees your numbers, it is worth checking the balance and status of services. Sometimes a technical failure on the base station side can lead to incorrect signaling transmission. In such a situation, re-registering on the network (turning airplane mode on and off) or rebooting the device helps.
If you often call numbers with the Anti-AON service, create a separate contact or note with a reminder to temporarily turn on the number display before an important call, so as not to be ignored.
Frequently asked questions (FAQ)
Will the police or intelligence agencies see my number if I hide it?
Yes, he will absolutely see it. Hiding a number (Caller ID) works only at the level of displaying information on the screen of the interlocutor’s phone. The telecom operator and authorized government agencies have access to complete connection data, including your real number, device IMEI and call time. Anonymity in this case concerns only the ordinary user, and not monitoring systems.
Is it possible to hide a number when sending an SMS?
No, it is technically impossible to hide the sender's number when sending a regular SMS. The message header always contains the number of the SIM card from which it was sent. There are anonymous SMS services via the Internet, but they send messages not from your SIM card, but from virtual numbers, and this is a different technology.
Why, after setting up, does the phone write “Network does not support”?
This message means that your current mobile operator does not allow subscribers to hide the number on their own through the phone settings. In this case, you need to contact the operator's support service to find out the terms of provision of such a service or try to use USSD codes, if they are supported.
Will hiding the number in instant messengers (WhatsApp, Telegram) work?
No, the settings for hiding the number in the phone do not affect the operation of Internet instant messengers. In WhatsApp, Viber or Telegram, your number is visible to everyone who has you in their contacts, or to those you write to first (depending on the privacy settings of the application itself). Anonymity in instant messengers is configured within their own privacy menus.
How to return the number display back?
To show the number again, go to the call settings and select “Show number” or “Default network”. If you used a USSD code, enter the unhide command (usually *31# or a similar one specified by the operator). Changes take effect almost instantly.