How to put a password on SIM-MTS card in the smartphone Xiaomi Redmi: full instruction with nuances

Protection SIM-Password cards are a simple but effective way to prevent unauthorized use of your number. - Xiaomi Redmi smartphones (including Note 12 Pro models)+, Redmi 10C, POCO X5 and others) setting PIN-The code for the MTS card takes no more than a minute, but requires knowledge of several nuances «PUK-Blocked after three incorrect typing attempts – and don’t know how to unlock the card without losing the number.

In this article, you will find not only step-by-step instructions for setting a password, but also ways to restore access if you forgot. PIN, Answers to frequent questions: Why do you ask? PUK-code, how to disable password request when turning on the phone and what to do if SIM-The map is no longer defined after the protection is activated, and all the steps are illustrated with screenshots of the current version. MIUI (14-15) and tested on Redmi models 2022-2026.

Why put a password on SIM-map?

Substantive function PIN-This is a code that blocks access to the mobile network when you steal or lose your phone:

• 📞 Call or send SMS from your room (even if you get it out) SIM-card and inserted into another phone).
• 💳 Use mobile banking if it is tied to a number (Sberbank, Tinkoff, etc.).
• 🔄 Connecting paid services to MTS through USSD-commands (e.g. *111#).
• 📡 Connect to the Internet through your SIM-card if you don't know PIN).

However, there is a downside: every time you turn on or restart, Xiaomi Redmi will require input. PIN-It can be annoying if you reboot your phone often. MIUI There is an option to disable the password request - but only after the first successful entry.

It is important to understand the difference between PIN and PUK:

• PIN (Personal Identification Number: 4-8 digits that you set yourself or receive from your personal Identification Number. SIM-card (by default, often 0000 or 1234).
• PUK (Personal Unblocking Key – 8 digits that the operator (MTS) gives to unlock SIM-Cards after 3 incorrect attempts to enter PIN. It cannot be changed, only to ask for support.

Preparation: What to Know Before Setup

Before setting the password to SIM-MTS card in Xiaomi Redmi, check out:

1. Standard. PIN-code SIM-It's usually on the plastic holder where you pushed the chip out. If you lost it, the standard MTS combinations are 1111, 0000 or 1234.
2. Version MIUI. In older versions (up to) MIUI 12) path to settings SIM The actual screenshots in this article are taken on MIUI 14.0.5 (Android 13).
3. Presence PUK-If you've never changed the code. PIN And didn't block the map, PUK You can find it in the MTS personal account or request it by 0890 (free call).

If you bought it. SIM-A long time ago, you don’t remember the standard card. PIN, Do not enter at random - after 3 errors, the card will be blocked and it will be possible to unlock it only through the PUK. In this case, it is better to first throw off. PIN to the factory value (instruction below).

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If you're afraid to forget PIN, Write it to a secure location (such as Google Keep notes with encryption) or use a password manager like KeePass. PIN plain-faced on the phone!

Step-by-step: how to put a password on SIM-MTS card in Xiaomi Redmi

Follow this algorithm to turn on protection PIN-code:

1. Open the Settings app (cog icon).
2. Go to section. SIM-Maps and mobile networks (or Mobile Network in older versions) MIUI).
3. Choose yours. SIM-MTS card (if there are two of them).
4. Slip on the block item SIM-maps (or Installation) PIN-code).
5. Activate the switch Lock SIM-maps (at the top of the screen).
6. Enter the current one. PIN-If you don't know, see the section "What to do if you forgot" PIN».
7. Come up with a new PIN (from 4 to 8 digits) and confirm it.
8. Press Ready – Protection activated!

After that, every time you turn on or restart, Xiaomi Redmi will require input. PIN-To disable the request (if it bothers you), go back to the same settings and deactivate the lock switch. SIM-● Cards – but only after the first successful entry.

If after setting the password, the mobile Internet or network disappeared, follow the following steps:

1. Go to Settings. → SIM-maps and mobile networks → Mobile network settings.
2. Select network mode 4G (preferably or Auto.
3. Turn on the mobile data switch.
4. If it doesn’t help, restart your phone.

How to disable the request PIN-code when you include Xiaomi Redmi

If you’re annoyed by the constant password entry every time you turn on your phone, you can turn it off — but only after the first successful unlock. SIM-For this, it's a map:

1. Go to Settings → SIM-cards and mobile networks.
2. Choose yours. SIM-map.
3. Slip on the lock. SIM-map.
4. Turn off the switch at the top of the screen.
5. Enter the current one. PIN-proof-code.

The phone will no longer require a password when booting, but protection SIM-The card will remain active, and it can be turned on again at any time. SIM-card and inserted into another phone, PIN I'll need it anyway!

What to do if you forgot PIN-code SIM-maps of MTS

If you don't remember PIN-code, you have three attempts to enter. SIM-The card will be blocked and it will be possible to unlock it only with the help of PUK-Here's what to do depending on the situation:

Method 1: Remind yourself of the standard PIN

Try to enter one of the standard combinations for MTS:

• 0000 or 1111 – the most common factory PIN.
• 1234 is the standard for many operators.
• The last 4 digits of the phone number (for example, if the number is +79123456789, try 5678 or 6789).

Way 2: Find PUK-code-off PIN

If you're blocking SIM-You'll need a map. PUK. It can be obtained:

• 📄 On a plastic holder. SIM-maps (near the PIN).
• 📱 In the personal office of MTS: My MTS → Services → Management SIM-card.
• 📞 By MTS Support: dial 0890 from another number and follow the instructions of the voice menu.

When you have PUK:

1. Put it in. SIM-map.
2. Enter the request PUK-code (it consists of 8 digits).
3. The system will require you to install a new PIN — Think of it and confirm it.

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Never enter. PUK-After 10 wrong attempts, code at random. SIM-The card is blocked forever, and it will have to be changed in the MTS salon.

Method 3: Re-release SIM-map

If you lost PUK or you have blocked the card permanently, you just have to order a duplicate:

1. Visit the MTS salon with a passport.
2. Write a reissue application SIM-Cards (free if the reason is blocking).
3. Get a new one. SIM same number (activated within 1-2 hours).

The cost of reissue in 2026 is 0 rubles when blocked due to the fault of the subscriber, but in some regions a commission of 50-100 rubles may be charged for the manufacture of a duplicate.

Common mistakes and their solutions

When you set up PIN-code SIM-MTS map in Xiaomi Redmi users often face the following problems:

After installation PIN-Xiaomi Redmi has stopped seeing the network, try it out:

1. Manually select the operator: Settings → Mobile network → Network operators → Search.
2. Reset network settings: Settings → SIM-maps and mobile networks → Resetting mobile network settings.
3. Update firmware MIUI (sometimes SIM Corrected in new versions).

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If, after input, PIN phone writes "Authentication error", try to extract and re-insert SIM-Sometimes the contacts oxidize, and the system can't read the data correctly.

Security: How to Protect SIM-hack-card

Installation PIN-The code is just the first step, to make sure you're as safe as possible. SIM-MTS card, follow these recommendations:

• 🔐 Don’t use simple combinations like 1234 or 0000, but instead, think of a unique code, such as the date of birth of a loved one (but not your own!).
• 📱 Activate two-factor authentication in the personal account of MTS. This will protect against fraudsters, even if they recognize your account. PIN.
• 🚫 Don't tell anyone. PUK-It can't be changed, and if the scammers find out, they can unlock yours. SIM.
• 🔄 Check active services regularly through USSD-team *111*09#. Fraudsters can connect paid subscriptions, even if they SIM blocked PIN.

Be especially careful with phishing. SMS, Those who are supposedly coming from MTS to ask for PIN or PUK. The operator never requests this data for SMS Or a call! An example of a fraudulent message:

⚠️ Attention: If you have come SMS like yours SIM-- The card is locked. PIN by reference [suspicious] URL]», Don't click on a link or enter data, it's an attempt to steal access to your number.

If you suspect that your SIM-The card is compromised (for example, money is missing from the account or comes to the account). SMS to connect services, immediately:

1. Call MTS support at 0890 and block the card.
2. Visit the operator’s salon with a passport for reissue SIM.
3. Check the services tied to the number (banks, social networks) for unauthorized access.

FAQ: Frequent questions about PIN-code SIM-MTS card in Xiaomi Redmi