The need to limit the ability to make calls from a mobile device arises for various reasons: from controlling a child’s expenses to preventing accidental dialing in a pocket or blocking a phone if it is stolen. The operating system Android provides many built-in tools for solving this problem, but their location often depends on the software version and the manufacturer's shell.
In this article we will analyze in detail all the available methods of blocking outgoing communications. You will learn how to use special service codes, set up restrictions through the developer menu, use third-party utilities and configure parental controls. Call blocking Can be either full or selective, which gives flexibility in managing the device.
Before you start setting up, it is important to understand the difference between blocking at the SIM card level and at the phone software level. The first option is more reliable, since the ban is valid even when changing the device, while the second can be reset when resetting the settings or flashing the firmware.
Using service codes and operator settings
The fastest way to limit the ability to make calls is to use USSD commands provided by the mobile operator. These commands activate the Call Barring service directly on the cellular network, so they work regardless of the state of the smartphone. To activate, you usually need to enter a special code in the dialing field.
The standard code for barring all outgoing calls looks like *33*PIN#, where PIN is a password that you come up with or receive from the operator. However, the syntax may differ for different providers (MTS, Beeline, Megafon, Tele2). For example, to completely block outgoing messages, a code is often used *33*0000#, where 0000 is the standard default password.
If you do not know your password for managing bans, you need to check it in your personal account or support service. After entering the command, a notification about successful activation of the service will appear on the screen. To remove the restriction, use the cancellation code, usually this #33*PIN#.
⚠️ Attention: When activating the restriction through the operator, toll calls will be blocked, but emergency numbers (112, 911) and emergency calls often remain accessible by law.
This method is ideal for situations where the phone can be stolen or lost, since the attacker will not be able to make a call even after replacing the SIM card if the service is tied to a number and not to the device. However, for daily use by parents to control children, this method is less convenient due to the need to enter codes each time.
Before activating call barring via USSD codes, make sure that you have enough funds on your balance, as some operators charge a small fee for activating the blocking service.
Call restriction through phone settings
B The standard "Phone" application of most modern smartphones based Android has a built-in menu for managing calls. To find it, open the dialer, click on the three dots in the corner of the screen and select Settings. Next, you should look for the “More” or “Advanced” section, where the “Call Blocking” item may be located.
Inside this menu you will see a list of options: “All outgoing”, “Outgoing international”, “Outgoing when roaming”. Selecting "All outgoing" will require you to enter a password. If you have not previously set a lock password, the system will prompt you to create one. Remember this code, because without it you will not be able to unlock the function.
It is worth noting that the interface may differ depending on the shell. On devices Samsung the path may look like Settings → Applications → Phone → Number blocking, and on pure Android (Pixel, Motorola) the options may be hidden deeper in the system communication settings. In some cases, this function is completely absent in the stock firmware.
- 📱 Open the "Phone" application and go to the settings menu.
- 🔒 Find the "Call blocking" or "Restriction" section calls. Calls via instant messengers (
- 🔢 Activate the ban on "All outgoing" and set a secure PIN code.
- ✅ Check your blocking status by trying to make a test call.
It is important to understand that this setting only blocks voice calls over the cellular network. Calls via messengers (WhatsApp, Telegram, Viber) via Wi-Fi or mobile data will remain available unless you restrict access to the Internet separately.
Parental controls and digital wellbeing
For parents who want to limit their child's communication, the most effective solution is to use the built-in system Digital well-being (Digital Wellbeing) or specialized parental control applications. These tools allow you to flexibly set your schedule and limits without completely blocking your phone.
In the menu Settings → Digital Wellbeing → Parental Controls you can set up a child’s profile. There is a feature available to restrict calls at certain times, for example, during classes or at night. You can allow calls only to selected contacts (mom, dad, grandma), while blocking all other numbers.
Third-party applications such as Kaspersky Safe Kids or Google Family Linkgive even more options. They allow you to remotely block outgoing calls from a child's device in real time through the parent's smartphone. This is convenient if a child has lost the phone or is using it for other purposes.
⚠️ Attention: When using Google Family Link, to completely block calls, you may need to temporarily disable the mobile data on the child's device, since some synchronization functions work over the network.
The advantage of this approach is the possibility of fine-tuning. You do not deprive your child of communication completely, but only filter unwanted contacts and limit the time of communication. This instills discipline and protects from strangers.
☑️ Setting up parental controls
Specialized applications for blocking
If the built-in functions are not enough, there are many applications in the store Google Play tersedia that specialize in managing calls. The leaders in this category are Call Blocker, Should I Answer? various anti-virus systems with a call protection module. They work on top of the standard phone book and intercept attempts to dial a number.
Such apps allow you to create “Black lists” for outgoing calls. You can block calls to certain prefixes (for example, premium numbers) or to specific contacts. Some applications have a "Panic" mode, which instantly blocks all communications when you press the volume button.
When installing such software, you must provide it with advanced access rights, including the right to manage calls and read contacts. Without these permissions, the application will not be able to intercept dialers. In modern versions Android (starting from 10 and higher), obtaining root access to manage calls has become a more strict process for security reasons.
| Application name | Blocking type | Presence of advertising | Setting complexity |
|---|---|---|---|
| Call Blocker | By number/prefix | Yes (in the free version) | Low |
| Kaspersky Security | Black/White list | No (in paid) | Average |
| Avast Antivirus | Anti-thief + Calls | Yes | High |
| Mr. Number | Spam + Outgoing | Yes | Low |
Using third-party software gives flexibility, but consumes additional battery and RAM resources. For older smartphone models with a small amount of RAM, this can lead to a slowdown of the system.
Why do blocker applications require so many rights?
The Android system isolates applications from each other. In order for a app to interrupt your call or block dialing, it must have system-level privileges, otherwise the OS simply will not allow it to interfere with the process of connecting to the network.
Emergency calls only mode and airplane mode
Sometimes you need the simplest and most radical way to disconnect the connection. Switching your smartphone to airplane mode (Avia Mode) completely disables all radio modules, including cellular communications, Wi-Fi and Bluetooth. In this state, outgoing calls are technically impossible, since the phone does not see the operator’s network.
However, there is a nuance: even in airplane mode, dialing emergency numbers remains available on many devices. This is a legal requirement in most countries. If your goal is to prohibit any calls, including emergency calls (for example, to prevent a child from playing with the phone), this method will not work 100%.
A more advanced option is to use the engineering menu or hidden settings to switch the network type. If you force the “2G Only” mode or disable network registration through the engineering menu (code ##4636##), the phone will no longer register in cells. But this method is difficult for the average user and can lead to loss of connection until a reboot.
For temporary blocking, it is also convenient to use widgets on the desktop. Many launchers allow you to add a button to quickly turn off mobile data or switch profiles. While this does not block voice calls directly, it limits the functionality of the device, making it less attractive for unauthorized use.
Airplane mode is the most reliable way to instantly stop all connections, but it also turns off the Internet and notifications, which can be inconvenient in everyday life.
Problems and solutions when blocking calls
Users often encounter with a situation where the lock setting does not work or is reset after a reboot. This may be due to the fact that a third-party application has been unloaded from memory by the system to save power. To avoid this, you need to add the blocker application to the battery optimization exceptions.
Another common problem is a conflict between operator blocking and phone blocking. If your operator has already blocked outgoing calls, your phone settings may throw an error when you try to enable the duplicate function. In such cases, you should first remove the ban on the provider's side, and then configure the phone.
On devices with rights Root the blocking possibilities are almost limitless. Using applications like Titanium Backup or specialized scripts, you can completely disable the telephone module at the software level. However, obtaining root access voids the warranty and creates security risks, so it is recommended only for experienced users.
⚠️ Attention: Settings interfaces and codes may change with firmware updates. If the described methods do not work, check the official help for your specific smartphone model or version of Android.
If none of the methods help, the problem may lie in a hardware malfunction of the SIM card or communication module. In rare cases, mining viruses or Trojans can hijack call control, ignoring your blocking settings. In such a situation, a full scan of the system with an antivirus is necessary.
If you have forgotten the password for the call blocking function in your phone settings, try using standard combinations: 0000, 1234, 1111. If they do not work, you will have to reset the settings of the "Phone" application to factory settings.
Is it possible to block only paid numbers?
Yes, most operators allow you to activate the “Call Barring to Toll Numbers” service separately. You can also block calls to short numbers in the phone settings, if this function is supported by the firmware.
Will WhatsApp work when blocking outgoing calls?
Blocking regular phone calls does not affect instant messengers. To block calls in WhatsApp, you need to go to the settings of the application itself and disable permission to use the microphone or block contacts within the messenger.
What to do if a child has unlocked the block?
If a child has learned the password or disabled the application, use remote control solutions such as Google Family Link. They allow you to block the device remotely and require the parent's password for any settings changes.
Does outgoing blocking affect the receipt of SMS?
No, outgoing call blocking does not block incoming calls and SMS messages. You will be able to receive text messages and calls from other subscribers unless you separately set up incoming barring.
How to unblock calls if you forgot your blocking PIN?
If this is the PIN from the SIM card (PUK), you can find it out from your operator. If this is the phone setup password, you will need to reset the Phone application through the app menu or completely reset the device (Hard Reset), which will delete all data.