Protection SIM-Password cards are one of the most effective ways to prevent unauthorized access to your phone number. Even if a Xiaomi smartphone falls into the wrong hands, an attacker will not be able to use mobile communication without entering. PIN-This is especially important for Redmi users, POCO and other brand models, where SIM-The card is often used for two-factor authentication in banks and instant messengers.
In this article you will find a step-by-step instruction for setting a password on SIM-The map, you will learn how to change or disable PIN-And the code, and what to do if you forget the combination, and we'll look at the settings in the shells. MIUI different versions (from the MIUI 12 to MIUI 15) and give recommendations on how to choose a strong password, and you will also learn why some operators (e.g. MTS, Beeline, Tele2) do not activate the protection by default. SIM-maps and how to fix them.
Why set a password for SIM-map
Many users neglect protection. SIM-But this is a dangerous misconception. Here are 3 key reasons why PIN-code SIM mandatory:
- 🔒 Protection against theft of a number. PIN-The attacker can get yours out. SIM-Insert it into another phone and access it. SMS (For example, to reset passwords in banks or social networks).
- 📱 Blocking unauthorized use, even if the phone is unlocked, without PIN-code SIM-The card will not be available for calls and mobile Internet.
- 🛡️ Enterprise standards. Many companies require employees to activate PIN-work-code SIM-Cards to protect confidential information.
According to Kaspersky Lab, in 2023, more than 30% of bank account frauds began with theft or cloning. SIM-Installation of maps. PIN-This risk is reduced to almost zero, as the activation of the duplicate SIM The operator will need your passport and personal presence.
⚠️ Note: If you use eSIM in Xiaomi 13, Xiaomi 14 or other flagships, the protection works differently – the password is set through the virtual settings. SIM. For physical nano-SIM, the instruction below fits all models, including the Redmi Note 12, POCO X5 and budget Redmi A2.
Preparation: What to Know Before Setting a Password
Before activating. PIN-code, make sure that:
- You have a standard SIM-card (not eSIM) for virtual SIM process.
- You know. PUK-code SIM-card (it is specified on the plastic holder or in the contract with the operator) It is required if you make a mistake 3 times when entering PIN.
- The phone supports the SIM lock function (all Xiaomi models since 2016 release have this option).
If you've never installed PIN-The standard combinations (like 0000 or 1234) are easy to crack, so it is not recommended to use them.
| Operator. | Standard PIN by default | Where to find out. PUK-code |
|---|---|---|
| MTS | 1111 or 0000 | On the SIM starter package or in the personal account |
| Beeline | 1234 | In the contract or on the website in the section "My SIM-cards" |
| MegaFon | 0000 | On the back. SIM-holder |
| Tele2. | 1234 or 1111 | In SMS when activated or in a mobile application |
⚠️ Note: If you have purchased SIM-hand card (for example, on Avito), standard PIN/PUK-The codes may have been changed by the previous owner, in which case contact the communication room to reissue the card.
Step-by-step instructions: how to install PIN-code SIM-map
The activation process is the same for most Xiaomi models, including the Redmi 10, POCO F4, Xiaomi 12T and others.
- Open the Settings app (the gear icon on the desktop).
- Go to Passwords and Security (in MIUI 14+, the path may be called Security).
- Select Other Security Settings (or Settings) SIM-maps in older versions).
- Slip on the option to Set the SIM-card lock (in some firmware – PIN lock).
- Turn on the switch Lock. SIM-maps and enter the current PIN (if it was previously installed) or the operator's standard code (see table above).
- Come up with a new one. PIN-code (from 4 to 8 digits) and confirm it. Avoid simple combinations such as date of birth.
- Reboot your phone to make the changes take effect.
After activation at each turn on or restart of the smartphone, the system will request input PIN-unlockable SIM-If you use two cards. SIM-Dual-SIM (Dual-SIM) – the procedure must be repeated separately.
The phone asks for a password when turned on
Mobile communication works after PIN is entered
- Backup copies retained PUK-code
Password is recorded in a secure place (not on the phone!)
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Xiaomi with MIUI 13 and later has the option to Hide SIM lock notifications. It can be turned off so you don’t see constant reminders about PIN.
How to change or disable PIN-code SIM-map
If you want to change your password or remove the protection altogether, do the following:
- 🔄 Change of change PIN-Code: Go to Settings → Passwords and security → Lockdown SIM-Choose to change the cards. PIN-code SIM. Enter the old password, then the new one (twice to confirm).
Shutdown PIN-code
- In the same menu (SIM-card lock) turn off the switch.
- Enter the current PIN for confirmation.
After the blackout PIN-code SIM-The card will become vulnerable to intruders, and we recommend that you activate the protection again if the phone is used to work or store sensitive data.
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If you travel frequently, you should PIN-code SIM-This will protect you from scammers who may try to clone the card via roaming networks.
What to do if you forgot PIN-code SIM-maps in Xiaomi
If you have entered incorrectly 3 times in a row PIN-code, SIM-The card will be blocked and the phone will show the request for input PUK-You'll have 10 attempts, and then the card will be permanently locked, and you'll have to reissue it in the operator's cabin.
Here is the algorithm for how to do this if you forget your PIN:
- Find it. PUK-code: On the launch package SIM-In the contract with the operator or the check when buying, in the personal account on the operator's website (section "My own" SIM-via a mobile application (My MTS, My Beeline, etc.).
Enter. PUK-code in the window that appears on the phone.
After successful entry, the system will offer to install a new PIN-code.
If you lost and PUK-Don’t try to guess it after 10 wrong attempts SIM-The card will be locked forever.
Can we restore it? PIN-code-less PUK?
Common Mistakes and How to Avoid Them
When you set up PIN-code SIM-Xiaomi users often face typical problems, and here are the most common ones and ways to solve them:
| Problem. | Reason. | Decision |
|---|---|---|
| Phone does not request PIN after restart | Misfunction of MIUI or disabled lock option | Check your password and security settings or reinstall your PIN |
| SIM-The card is blocked after entering correctly PIN | SIM chip or operator error is damaged | Restart your phone or contact the communication salon |
| You can set a PIN longer than 4 digits. | Restriction of the operator or the old SIM-map | Contact the operator for a replacement. USIM-map |
Another common mistake is using the same thing. PIN-code SIM-It's not safe, because if an attacker learns the combination, they'll have access to all your numbers. SIM.
Additional security measures for SIM-maps in Xiaomi
Installation PIN-Code is just the first step, to protect your own security as much as possible. SIM-Map, follow these recommendations:
- 🔐 Activate the lock on the screen, even if SIM-The card is protected, without a password to the phone, the attacker can access other data.
- 📵 Turn off notifications on the locked screen. This will prevent information from leaking from the screen. SMS (For example, bank codes).
- 🔄 Update regularly MIUI. New firmware versions fix security-related vulnerabilities SIM-map.
- 📱 Use remote control apps (like Google’s Find My Device) to lock your phone in case of a theft.
If you use mobile banking frequently, consider connecting the service "No room change without visiting the office" with your operator, which will protect you from fraudulent transfer of the number to another. SIM-map.
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Even with the set. PIN-Do not back up passwords in phone notes or cloud services. Use physical media (for example, written code in a notebook).