The protection of personal data in modern smartphones begins with basic security measures, and one of them is the installation of the device. PIN-code SIM-In the Xiaomi, Redmi and POCO This feature often goes unnoticed, although it can prevent unauthorized use of your phone number in the event of theft or loss of a gadget. PIN-The attacker can easily get out of the SIM-card, insert it into another machine and access calls, SMS (including bank confirmation codes) and mobile internet.
In this article, we will discuss how to activate the protection. SIM-cards on any Xiaomi smartphone – from the flagship models of Xiaomi 14 Ultra to the budget Redmi Note 12. You will learn not only the standard way through the settings, but also alternative methods for devices with custom firmware (for example, Xiaomi.EU). PIN-code, how to unlock SIM-map PUK-Why some operators (such as MTS or Tele2) may block this feature by default.
Important: Protection SIM-Passwords do not replace locking the screen or encrypting data, but they do provide an additional barrier, such as if your phone is stolen and if you have a password, you can use it to protect your computer. SIM-card protected PIN-If you code, a thief will not be able to use your number immediately for fraudulent activities, and on some Xiaomi models (for example, with the help of a computer). MIUI 14 and newer) PIN-code SIM-The card may conflict with the dual apparatus function. SIM Dual Standby) if both cards require a password.
Why put a password on SIM-map?
Many users mistakenly believe that locking the screen of a smartphone (for example, a fingerprint or a pattern lock) completely protects their data. SIM-The card remains vulnerable, and it can be retrieved and used on another phone. PIN-defense:
- 🔒 Protection against fraud: no PIN-The attacker will be able to get SMS with confirmation codes for accessing bank accounts, social networks or electronic wallets (for example, Sberbank Online, Tinkoff).
- 📱 Number safety: operators (for example, MegaFon or Beeline) can block SIM-A card with suspicious activity, but if it is protected PIN-Code, the risk of unauthorized use is reduced.
- 🔄 Control of Dual SIM: Xiaomi smartphones with two slots (for example, Redmi Note 13 Pro)+) PIN-This code will help to avoid confusion between personal and work SIM-card.
- 🛡️ Additional layer of security: even if the thief drops the phone to the factory settings, no PIN-code SIM-the card will remain blocked.
Statistics show that more than 60% of smartphone thefts are accompanied by fraud attempts SIM-card. PIN-The code does not guarantee 100% protection, but it makes it much harder for attackers, for example, in 2023 Roskomnadzor reported a 40% increase in SIM-swapping cases compared to the previous year – most of them made possible due to the lack of basic protection.
⚠️ Note: If you use eSIM on Xiaomi smartphones (e.g. Xiaomi) 13T Pro, then installation PIN-code is similar, but some operators (e.g., Iota) may not support this feature for virtual SIM.
Step-by-step instructions: how to put PIN-code SIM-map
The activation process depends on the version of the MIUI shell. Below is a universal instruction that is suitable for most models, including the Xiaomi 12T, Redmi A2+, POCO X5 Pro and others. If your smartphone runs on MIUI 12-14, the steps will be identical.
☑️ Preparation for installation PIN-code
- Open the Settings app (the gear icon on the home screen or in the application menu).
- Go to section. SIM-Maps and mobile networks (in some versions) MIUI This can be called a mobile network or a dual network. SIM-map).
- Choose. SIM-The card you want to set your password for (if you have a dual card). SIM, For example, in the Redmi Note 11 Pro).
- Slip on the block item SIM-maps or Install PIN-code SIM-map.
- Turn on the switch Lock. PIN-Code (may be called Requesting) PIN).
- Enter the standard. PIN-code that comes with SIM-card (usually 0000, 1111 or 1234, but the exact code is indicated on the plastic holder).
- Think of it and enter a new one. PIN-4 to 8 digits code: Avoid simple combinations such as date of birth.
- Confirm the new one. PIN-code and save the changes.
After activation, the phone will request PIN-code at each turn on or reboot, and when retrieved/inserted SIM-If you use two cards. SIM-Repeat the process for the second.
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If you're afraid to forget PIN-Save it in a secure place, such as in the Xiaomi Cloud app (in the Notes section with encryption) or in a password manager like KeePass. Never store it in plaintext on the phone itself!
What to do if you cannot install PIN-code?
Sometimes users have problems when trying to activate the protection. SIM-Let's look at typical situations and their solutions:
| Problem. | Possible cause | Decision |
|---|---|---|
| No item “Blocking” SIM-maps" in settings | Outdated version of MIUI or custom firmware | Update the software through Settings → About Phone → Update the system or install the official firmware through the Mi Flash Tool |
| The phone does not accept standard PIN-code | The operator changed the default code | Contact the communication salon of your operator or check the code in your personal account (for example, on the MTS website or Beeline) |
| After input PIN-code makes a mistake «SIM-card blocked» | Three misplaced attempts at input | Use it. PUK-code (indicated on the plastic holder) SIM or in a contract with the operator. PUK mis-entered 10 times, SIM-The card is locked forever. |
| Function not available for eSIM | Limitation of operator | Check with the operator (e.g. MegaFon or Tele2) whether the PIN for eSIM is supported in your tariff. |
If your Xiaomi runs on custom firmware (like LineageOS or Pixel Experience), the way to setup is to get it right. SIM-The cards may be different:
- Go to Settings → Security → SIM-card lock.
- Use the SIM Toolkit application (if installed).
- Reset network settings through Settings → System system → Reset → Reset network settings (data will not be deleted, but SIM-reboot).
⚠️ Note: On some Xiaomi models (e.g, POCO F5) post-update MIUI 14 may lose the possibility of installation PIN-second-code SIM-Dual-mode cards SIM. This is a firmware bug – check for updates or contact Xiaomi’s support team.
How to Reset or Change PIN-code SIM-map?
If you want to change the current PIN-Reset the code to a new value or reset it to a standard value, do the following:
- Go to Settings. → SIM-maps and mobile networks.
- Choose the right one. SIM-Map and tap Change PIN-code.
- Enter the current one. PIN-code.
- Specify new PIN-code (from 4 to 8 digits) and confirm it.
If you forgot the current one PIN-You have 3 attempts to enter the code, after the third attempt. SIM-The card is blocked and you will need to unlock it. PUK-Personal Unblocking Key (PIS) is a code that can be found:
- 📄 On a plastic holder. SIM-maps (near the PIN-code).
- 📑 In the contract with the operator (if saved).
- 🌐 In the personal account on the operator's website (section "My own" SIM-Cards" or "Service Management»).
- 📞 By phone hotline (for example *111# for MTS or 0611 for Beeline).
If you've entered PUK-code is wrong 10 times, SIM-The card is locked forever and will have to be replaced in the communication room!
What to do if you're lost PUK-code?
Features PIN-Protection of different models of Xiaomi
Depending on the smartphone model and version MIUI installation PIN-The code may have nuances. Let's look at the most common cases:
| Model/series | Features | Recommendations |
|---|---|---|
| Xiaomi 13/14 Series | Support for eSIM + physical SIM. PIN-code can be installed on both | For eSIM, check the operator’s PIN support (e.g. MegaFon supports, but Yota does not). |
| Redmi Note 10–12 | V MIUI 13 may not have an option for the second SIM Dual SIM | Update the firmware to MIUI 14 or use one SIM s PIN-ome |
| POCO F/X series | On custom firmware (for example, Xiaomi.EU) the path to settings may differ | Search for Security → SIM Lock or use the SIM Toolkit |
| Xiaomi Mi A Series (Android One) | Pure Android – settings like on Pixel or Samsung | Settings → Security → SIM-card lock |
On smartphones with MIUI 14 and newer (e.g. Xiaomi) 13T) Automatic input function appeared PIN-It allows you to skip manual input if the device is unlocked by a fingerprint or face, to activate it:
- Go to Settings → Passwords and Security → Screen Lock settings.
- Enable the Auto Enter option PIN-code SIM.
- Confirm current PIN-code.
This feature is convenient but reduces the level of security – if someone gets access to an unlocked phone, they will be able to extract the phone. SIM-zip-card PIN.
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On smartphones Xiaomi with MIUI 14+ can be activated auto-input PIN-code SIM When you unlock the screen, but it reduces protection, use this feature only if you are confident in the security of your device.
Frequent Mistakes and How to Avoid Them
When working with PIN-code SIM-Users often make errors that lead to a lock or vulnerability:
- 🔢 Use of simplicity PIN-code: combinations like 1234, 0000 or birth dates are easy to match. Use random numbers like 7492.
- 📱 Storage PIN-If the phone is stolen, the thief will have access to the phone. SIM-Store the code in a secure location (e.g. Google Password Manager or Google Password Manager) 1Password).
- 🔄 Ignoring PUK-code: many users don't know where it's listed and lose it.Photograph the plastic holder SIM Save your photos in the cloud (e.g., Xiaomi Cloud or Google Drive).
- 🔋 Entering PIN-code at low battery charge: if the phone runs out during input, SIM-The card may be blocked. Always check the charge level before setting up.
Another common problem is conflict. PIN-code with a dual function SIM Dual Standby (DSDS). On some Xiaomi models (e.g. Redmi) 9A) activated PIN-code SIM-The card error may be "No network:
- Turn it off. PIN-code SIM-map.
- Reboot the phone.
- Check if the network is on. If so, activate it. PIN-code only for the main SIM.
⚠️ Note: On Xiaomi smartphones with MediaTek processor (e.g. Redmi) 10C) after-reset to factory settings PIN-code SIM-The card may be reset to the standard value. Always check the protection after the reset!
Alternative means of protection SIM-maps in Xiaomi
Besides the standard PIN-There are additional security measures that can be used on Xiaomi smartphones:
- 🔐 Blocking the application "Phone": in Settings → Annexes → Phone. → Permissions can be used to set a password to access calls. PIN-code SIM, but it'll add a layer of protection.
- 📡 Disconnecting the mobile network when blocking the screen: in Settings → Battery and productivity → Power management can be configured to turn off mobile Internet when you lock your phone.
- 🛡️ Use of the VPN for SMS: Some operators (e.g. Tele2) allow redirection SMS It's a secure number through your personal account, and it'll reduce the risk of interception of the confirmation codes.
- 🔄 Two-factor authentication for the operator: MTS and Beeline have the option to confirm important actions (for example, changing the tariff) through an additional code.
For users who travel frequently, it is useful to know that some overseas operators (e.g. in Europe) require input. PIN-If you are using Xiaomi with two SIM-Cards (such as local and roaming), make sure both are protected.
Also worth considering is using virtual numbers to sign up for services, apps like Google Voice or Dingtone let you get a temporary number that is not associated with your primary number. SIM-This will reduce the risk of data breaches when you steal your phone.