Protecting your personal data on a smartphone starts with basic security measures, and one of them is installing it. PIN-code SIM-In Xiaomi devices, this function is implemented through standard settings. MIUI, But many users have difficulty activating it. Unlike unlocking the screen, the password is not the same. SIM-The card protects not only access to the phone book, but also prevents unauthorized use of mobile communications – for example, in case of theft or loss of a device.
In this article, we will discuss in detail how to include PIN-request for Xiaomi Redmi, POCO or Mi on different firmware versions (including MIUI 14), what nuances are important to consider when setting up, and what to do if you forget the code. PIN1 and PUK, We also explain why mobile operators are turning off this feature by default.
Why put a password on SIM-map
Many users mistakenly believe that locking the screen of a smartphone is quite reliable protection of their data. PIN-code SIM-The card solves other tasks:
- 🔒 Protection from intruders: even if the thief resets the phone to the factory settings, without PIN-code SIM-The card will remain blocked and the attacker will not be able to call or use mobile Internet.
- 📱 Fraud Prevention: with a Blocked SIM-map-infessible SMS (For example, to confirm payments or authorization in banks).
- 🔄 Safe Flashing: If you install custom firmware or perform a reset, SIM-The card will not be available without entering the code.
- 📡 Traffic Control: Children or colleagues will not be able to surreptitiously use your mobile Internet.
It is important to understand that PIN-It's not the same as a pattern lock or a fingerprint, it protects that. SIM-If you take the card out and put it in another phone, you ask for it. PIN-code will appear again.
⚠️ Attention: if you enter PIN-code incorrectly 3 times, SIM-The card is locked and you will need to unlock it. PUK-code (it can be found from the operator or in the personal account). PUK-The card will have to be replaced.
Preparation: What to Know Before Setup
Before activating. PIN-Check out a few key points:
- Find out the standard PIN-code: usually listed on a plastic holder SIM-cards (complete with card) or in SMS If you've changed it, use the current one.
- Check the MIUI version: Old firmware (before MIUI 10) may have different paths to settings. Update the system if possible.
- Have your hand on it. PUK-code: in case of an error in input PIN. It can be found in a contract with the operator or in a personal account (for example, at MTS, Beeline, MegaFon or Tele2).
If you never turned it on PIN-The request is likely to be using the operator's standard code:
| Operator. | Standard PIN1 | Standard PUK |
|---|---|---|
| MTS | 1234 or 0000 | It's in the contract. |
| Beeline | 1234 | 8 digits in SMS when activated |
| MegaFon | 1111 or 0000 | In my private office. |
| Tele2 | 1234 | On the back. SIM-map |
If you bought your phone with your hands, you should definitely drop it. PIN-The code is standard through the operator's settings before activating the protection, otherwise the previous owner will be able to block your SIM-map.
Step-by-step instruction: how to turn on PIN-request SIM-map
The activation process is the same for most Xiaomi models, but may vary slightly depending on the version of MIUI.
Method 1: Using standard settings (MIUI 12/13/14)
This method is suitable for most modern smartphones, including the Redmi Note 12, POCO X5, Mi 11 and others.
- Open the Settings app (cog icon).
- Go to the Passwords and Security section.
- Select Settings SIM-maps (or other security settings in some versions).
- Slip on the SIM-card lock line (may be called Install SIM-card PIN).
- Activate the switch and enter the current one. PIN-code (default 1234 or 0000).
- Confirm the action and restart the phone.
After restarting each time the phone is turned on or restarted, the system will request PIN-code SIM-map.
Method 2: For older versions of MIUI (up to MIUI 11)
In MIUI 9/10 firmware, the path to settings may be different:
Settings → More → Personal Information → SIM-card blockingIf you do not find the right item, use the search in the settings (the magnifying icon in the upper right corner) and enter the request “PIN SIM”.
Make sure you know the current one. PIN-code|Save. PUK-code in a safe place|Check the balance SIM-Cards (in case of blocking)|Update MIUI last-minute-->
Method 3: Through the menu USSD-codes (alternative method)
If the settings MIUI not allow PIN-request (for example, due to a system error), you can try to activate it through USSD-team:
- Open the Phone app.
- Enter the command ##4636## (Engineering menu opens).
- Go to the tab Information about the phone.
- Scroll down and find the SIM Lock option.
- Activate the option and enter the PIN.
This method does not work on all models and may not be available in the latest MIUI versions.
How to change or disable PIN-code SIM-mapping
If you decide to change the standard PIN to a more reliable one or completely remove the protection, do it through the same settings:
- Go to Settings → Passwords and Security → SIM-card settings → SIM-card lock.
- Choose Change. PIN SIM-map.
- Enter the current code, then a new one (from 4 to 8 digits).
- Confirm the change.
To disable the request PIN-Just deactivate the switch in the same menu, and the system will ask you to enter the current code to confirm it.
⚠️ Attention: if you turn it off PIN-request, SIM-The card will remain vulnerable to unauthorized use, and we recommend changing the code every 6-12 months to improve security.
💡
If you travel frequently, include PIN-request SIM-A card to avoid unexpected roaming costs: Attackers can use your card for expensive calls or SMS abroad.
What to do if you forgot PIN-code SIM-maps on Xiaomi
A situation where the user forgets PIN-It's a code that happens a lot:
- Try the standard combinations: 1234, 0000, 1111 or date of birth.
- Check the documents: PIN and PUK are indicated in the contract with the operator or on the packaging SIM-map.
- Contact the operator: 📞 Call from another support number (MTS: 0890, Beeline: 0611, MegaFon: 0500, Tele2: 611). 🌐 Restore the code through the personal account on the operator's website. 🏦 Visit the communication salon with a passport.
If the PUK is blocked
Don't try to pick up. PUK-code at random - after 10 wrong attempts SIM-The card will be permanently blocked.
Can we get around? PIN-request PUK?
Common Mistakes and How to Avoid Them
When you set up PIN-Users often make errors that lead to blocking SIM-Let's look at the typical cases:
| Mistake. | Effects of consequences | How to avoid |
|---|---|---|
| Three times injected with an incorrect PIN | Lockdown SIM-maps required PUK | Keep your PIN in a secure location (such as a password manager) |
| Use of simple code (1234) | Easy selection by attackers | Install a unique code of 6-8 digits |
| Disabling PIN before flashing | Risk of losing access to SIM after reset | Always check the lock status before updating MIUI |
| Storage PUK-phone-code | When stealing a device, an attacker unlocks the SIM | Save PUK in the cloud or on paper |
Another common problem is the conflict with two SIM-If you have Xiaomi with Dual support SIM, Make sure you are adjusting. PIN The correct map (the menu will indicate which one is the one). SIM1, which SIM2).
Additional security measures for SIM-maps in Xiaomi
PIN-code is just the first step to protecting mobile communications:
- 🔐 Activate two-factor authentication (2FA) This will prevent you from changing your settings. SIM-cards without your knowledge.
- 📵 Disable premium services-SMS through the operator’s personal account to avoid debiting funds by fraudsters.
- 🔄 Set up automatic contact backup in Settings → Google → Backup (in case of blocking) SIM).
- 🚫 Do not allow outgoing calls to short numbers (e.g. 900 paid service numbers).
If you use Xiaomi for work, consider installing a corporate one. MDM-Mobile Device Management, which allows you to remotely block SIM-card in case of loss of device.
💡
Even if you don't turn it on. PIN-Check your activity regularly. SIM-- The card is in the operator's personal account. SMS or calls may signal fraud.