How to put a password on SIM-Xiaomi card: protection against unauthorized access

Protecting your personal data on a smartphone starts with basic security measures, and one of them is installing it. PIN-code SIM-On Xiaomi devices (including Redmi models, POCO and Mi) this feature often goes unnoticed, although it can prevent unauthorized access to calls, SMS If the phone falls into the wrong hands, the attacker will not be able to use your phone. SIM-zip-card PIN-code – even after rebooting or retrieving the battery.

In this article, we will discuss how to activate the protection. SIM-cards on Xiaomi smartphones with a shell MIUI (including recent versions MIUI 14/15), What are the nuances that are important to consider when setting up, and what to do if you forget your password. PIN-code PUK-And why you should never keep them in your phone's notes, and the instructions are good for most models, from the budget Redmi Note. 12 before the flagship Xiaomi 14 Pro.

Why put a password on SIM-Xiaomi?

Many users neglect protection. SIM-There are several good reasons to activate the card, considering it unnecessary. PIN-code:

• 🔒 Protection against data theft: No PIN-The attacker can call, send, and send SMS (including paid ones) and use mobile internet from your number.
• 📱 Locking after rebooting: Even if the phone is unlocked, after switching off/on SIM-map will require input PIN-code.
• 💳 Fraud prevention: Many banking services are tied to a phone number. PIN-The fraudster will be able to get SMS confirmation-coded.
• 🔄 Related: If you forgot to sell your phone SIM-card before selling smartphone, PIN-The code will not allow the new owner to use it.

It is important to understand that PIN-code SIM-The cards are not the same as the unlock password or the pattern lock, but it's the communication module that protects the phone, for example, if you're using Xiaomi with two. SIM-Each card can be protected by a separate PIN-code.

Where to find the standard PIN-code SIM-map?

If you've never changed PIN-code, it is indicated on the plastic carrier to which it was attached SIM-It is usually a combination of 4 digits, such as 0000, 1234 or 1111. Most Russian operators (MTS, Beeline, MegaFon, Tele2) have standard PIN-codes:

If you do not have a plastic carrier, the standard PIN-code can be specified:

• 📞 Calling the operator’s support service (a passport is required for identification).
• 💻 In the personal account on the operator's website (section "Management" SIM-card").
• 🏦 In the salon of communication upon presentation of the passport.

⚠️ Warning: Never keep it. PIN and PUK-If the phone is stolen, an attacker can easily find and unlock it. SIM-map.

Step-by-step instructions: how to put a password on SIM-Xiaomi

Activation process PIN-The code is the same for most Xiaomi smartphones, regardless of model. MIUI 12/13/14/15, including the Redmi Note 11/12/13, POCO X5/F5, Xiaomi 12T/13/14 If you have a two-sim machine, repeat the steps for each. SIM-map.

Make sure that SIM-The card is active and recognized by the phone

Check the balance (on some tariffs, SIM lock requires a positive balance)

Connect your phone to charge (in case of a crash)

Remember or write down. PUK-paper-code-->

1. Open the Settings app** (the gear icon on the desktop).
2. Scroll down and select a section «SIM-Maps and mobile networks (or "Mobile Network" on some models).
3. Click on your name. SIM-maps, for example, SIM 1 (MTS) If you have two. SIM-Select the card you want to set the password for.
4. In the menu that opens, find the option “Blocking” SIM-cards" or "Request PIN-code and activate the switch.
5. The system will propose to enter the current PIN-code (the default is the operator's standard code) enter it and press OK»**.
6. If you want to change PIN-code, click "Change" PIN-* * enter the old and new (twice) new code should consist of 4-8 digits.

After activation, the phone will request PIN-code every time you turn it on or reboot it, if you type it incorrectly 3 times in a row, SIM-The card is locked and you will need to unlock it. PUK-code.

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If you have two-sim Xiaomi, it is recommended to protect PIN-code both cards, even if one is rarely used, and this will prevent unauthorized use of the backup number.

What to do if you forgot PIN-code SIM-maps on Xiaomi?

If you forgot. PIN-You have 3 attempts to enter the code, after the third failed attempt. SIM-The card will be blocked and it will be possible to unlock it only with the help of PUK-This code is 8 digits long and is indicated on a plastic carrier. SIM-map.

If you don't know PUK-code:

• 📱 Try to find the plastic carrier to which it was attached. SIM-card.
• 📞 Call the operator support service (numbers: 0890 for MTS, 0611 for Beeline, 0500 for MegaFon, 611 for Tele2).
• 💻 Clarify the code in the personal account on the operator's website (section "My tariff" or "Management" SIM-card").

If you enter incorrectly 10 times PUK-code, SIM-The card will be permanently locked, and it will have to be replaced in the communications room!

⚠️ Warning: Never try to guess. PUK-After 10 failed attempts SIM-The card will become inoperable and the number may be lost forever (depending on the operator's policy).

How to disable the request PIN-Xiaomi code?

If you decide to remove the protection SIM-Maps, do it in the same settings:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose the right one. SIM-map.
3. Turn off the SIM-card lock switch**.
4. Enter the current one. PIN-proof-code.

After that, the phone will stop asking for a password when it's turned on. PIN-If your phone is stolen, the attacker can use your phone immediately. SIM-card.

Common Problems and Their Solutions

When you set up PIN-In the case of Xiaomi, users are faced with a few typical problems. Let's look at them and how to solve them:

If none of the solutions worked, try:

• 🔄 Reset network settings: Settings → SIM-maps and mobile networks → Resetting network settings.
• 📱 Update MIUI: Outdated firmware may contain bugs. Check for updates in Settings → The phone. → Updating the system.
• 🔧 Contact the service center: If the problem is hardware (for example, a damaged slot for the service center) SIM-map).

Additional security measures for SIM-maps on Xiaomi

Installation PIN-Code is just the first step to protecting your SIM-Let's look at some additional measures that will help avoid problems:

• 🔐 Use the complex PIN-Avoid simple combinations like 1234 or 0000. You'd better come up with a unique 6-8 digit code.
• 📝 Keep it. PUK-Code in a safe place: Write it down on paper and keep it in an out-of-access place (not on your phone!).
• 🔄 Check activity regularly SIM-In the personal account of the operator you can see the history of calls and SMS — This will help to notice suspicious activity in time.
• 🚫 Disconnect the services with autopayment: If SIM-Cards fall into the wrong hands, scammers can activate paid subscriptions.

We also recommend that you activate two-factor authentication for your Mi Account (if linked to a phone number) and add another layer of protection:

1. Open Settings → Xiaomi Account → Security
2. Select “Two-step verification” and follow the instructions.

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PIN-code protects only SIM-For complete security, use a pattern lock, fingerprint or facial recognition.

FAQ: Frequent questions about PIN-code-on SIM-mapping