Daily turning on a smartphone often turns into a small puzzle when the system requires you to enter a digital code to access the network. Many users find this process unnecessary, especially if the gadget is protected by biometrics or a strong screen unlock password. It is possible to remove this barrier, and in this article we will analyze all the available ways to do this safely and quickly.
Before making changes, it is important to understand that PIN code (Personal Identification Number) is the first level of protection for your SIM cards. It prevents your number from being used on another device if your phone is lost or stolen. By disabling this request, you increase ease of use, but slightly reduce the level of physical security of the subscriber number.
The procedure for deactivating the code request is standard for most devices based on the operating system Android. However, the names of menu items may differ slightly depending on the version of the manufacturer's shell, be it Samsung One UI, Xiaomi MIUI or pure Android on smartphones Google Pixel. Below we will look at a universal algorithm of actions that is suitable for 95% of cases.
Preparing to change security settings
Before making changes to system parameters, make sure you know the current PIN code. The system will not allow you to disable the password request unless you first confirm your identity by entering a valid combination of numbers. Usually these are 4 digits that you set when you received the SIM card or changed yourself.
If you have never changed the standard settings, try entering the factory code, which is often indicated on the plastic SIM card holder. Standard combinations for different operators are often 0000, 1111 or 1234. It is important not to confuse the PIN code with the PUK code, as it is used to unlock after entering the wrong password three times.
It is also worth checking the battery charge level. Although changing a single setting takes seconds, a sudden power outage while the configuration is being written to the phone's memory can result in software crashes. Make sure the device has at least 20% charge or is connected to a power source.
Write down the current PIN on paper before disconnecting. If you decide to enable protection again in the future, you will need this particular combination, and not the standard factory one.
Universal method through Android settings
The main way to manage SIM card protection is through the system menu. In modern versions of Android, the menu structure has been unified, so finding the right item should not take much time. You will need to go to the section responsible for the connections and security of the device.
Open the application Settings on your smartphone. Further, the interface may differ slightly, but the logic remains the same: look for sections related to Security, Biometrics or Connections. Depending on the phone model, the path may look different.
On devices with pure Android (Pixel, Motorola, Nokia) the algorithm is as follows: go to Security and privacy → Additional security settings → SIM card lock. On smartphones Samsung the path often looks like this: Biometrics and security → Other security settings → Set up SIM card lock.
Once in the desired menu, you will see a switch "SIM card lock" or "PIN code request". It will be activated. Click on it and the system will ask you to enter the current code. After successful entry, the switch is deactivated, and the next time the phone reboots, it will no longer prompt for a password.
☑️ Algorithm for disabling protection
Features of different interfaces manufacturers
Electronics manufacturers often change the layout of menu items to adapt them to their corporate style. This can be confusing for a user who is used to a certain sequence of actions. Below is a table with paths for popular brands.
| Brand / Shell | Path to setting | Item name |
|---|---|---|
| Samsung (One UI) | Biometrics and security → Other security settings | Configure blocking SIM cards |
| Xiaomi (MIUI/HyperOS) | Passwords and security → SIM card confidentiality | Request PIN code |
| Google Pixel (Stock Android) | Security → Advanced → SIM lock | SIM card lock |
| Huawei / Honor | Security → More security settings | SIM card blocking |
Please note that on smartphones Xiaomi i Redmi the item may be hidden inside the section Passwords and securityand not in general settings. Sometimes the system prompts you to use Master Password (master password) instead of a PIN code if this function has been activated previously. In this case, you need to disable the protection through master password management.
Device owners OnePlus and Oppo should look into the section Password and biometrics. The item "SIM card lock"is often found there. If you cannot find the section you need, use the settings search. Just enter the word "SIM" or "PIN" into the search bar at the top of the settings menu, and the system itself will show the desired shortcut.
Why is there no "SIM Lock" item on my phone?
Some carriers or corporate profiles may hide this option. Also, the item may be missing if the SIM card is not installed or not detected by the system.
Using the engineering menu and codes
There is an alternative way to manage the SIM card parameters - through the engineering menu or special USSD commands. However, this method is less reliable and does not work on all devices. It requires entering a special sequence of characters in the Phone application, as when dialing a number.
One of the common commands to access the advanced testing menu is ##4636##. In the menu that opens Testing you can find information about the phone and sometimes SIM locker settings. However, on modern versions of Android, access to changing the PIN from here is often disabled for security reasons.
A more effective method may be to use AT commands through the terminal, but this requires root access and knowledge of the command line, which is not recommended for ordinary users. The easiest way is to use the standard settings interface, which is described above. Using third-party applications from the Play Market to remove a PIN code is also ineffective, since the Android OS does not allow applications to manage this level of security without special permissions.
⚠️ Attention: Do not try to enter random codes into the dialer (dialer) in the hope of finding a hidden menu. This may result in network settings being reset or phone functions being blocked. Use only proven paths through the settings menu.
Problems with input and blocking with a PUK code
The most common problem when trying to disable a PIN code is its forgotten value. If you enter the wrong code three times in a row, the SIM card will be blocked. To unlock you will need PUK code (Personal Unblocking Key). This is an 8-digit code that cannot be changed or matched.
Where can I find the PUK code? It is always indicated on the plastic card to which the SIM card was attached upon purchase. If the card is lost, the code can be found in the operator’s personal account on the website or in the mobile application. It can also be reported to the support service after confirming the identity of the owner of the number.
After entering the PUK code, the system will prompt you to come up with a new PIN code. It is at this moment that you can install a code that you definitely remember, or, following the instructions above, immediately disable its request. Be extremely careful: entering an incorrect PUK code ten times leads to irreversible blocking of the SIM card, and it will have to be changed at the operator's salon.
Sometimes users are faced with a situation where the phone requires a PIN code, although there was no previous request. This may happen after updating the system, resetting the settings, or moving the SIM card to another slot. In such cases, the system is reinsured and requires confirmation.
PUK code is an emergency key. It cannot be changed and is not prompted during normal operation. Store it separately from the phone, for example, in a cloud password storage.
Comparison of protection methods and recommendations
When disabling the PIN code, you should be aware of the difference between protecting the device and protecting the SIM card. An on-screen passcode, fingerprint, or Face ID protects the data inside your phone. The PIN code protects the SIM card itself from being used in another device.
If your phone is stolen and it is turned off, the thief will not be able to remove the screen lock. But if he replaces the SIM card in his phone, he will be able to receive calls and, more importantly, SMS verification codes from banks and instant messengers. This is why having a PIN is considered good security practice.
However, if you use your phone in a secure environment and value convenience, disabling the request is completely justified. Many modern smartphones allow you to set up automatic unlocking in trusted places or through a smart watch, which partially compensates for the lack of a PIN code on the SIM card.
⚠️ Attention: The interfaces of mobile banks and instant messengers are constantly updated. If you've disabled your PIN, make sure you have additional security installed on mission-critical apps like banking clients.
In conclusion, managing your security settings is a balance between convenience and security. Knowing how to remove the PIN code from a SIM card on Android, you can configure your gadget in a way that is convenient for you, but do not forget to periodically check the relevance of your passwords.
Frequently asked questions (FAQ)
What should I do if I forgot the PIN code and the PUK code is not saved?
You need to contact your operator's service center with your passport. The employee will give you a PUK code or give you a new SIM card with the same number. Without confirmation of identity, the operator has no right to provide this data.
Will the PIN code be reset when resetting the phone to factory settings?
No. The PIN code is stored on the SIM card chip, and not in the phone's memory. Resetting Android settings (Factory Reset) will not affect the protection of the SIM card. The code request will remain.
Is it possible to change the PIN code to a more complex one, for example, 6 or 8 digits?
Yes, in the same menu where you disable the request, there is usually an option “Change PIN code”. The standard allows the use of 4 to 8 digits. This will improve security if you decide not to disable the request completely.
Why does the phone ask for a PIN after a system update?
This is standard Android security behavior. After updates or a system reboot, you need to enter the PIN code once to activate the SIM card before loading all services.