How to passcode SIM-Map on Android-smartphone Xiaomi: the full guide

Protecting your personal data on your smartphone starts with basic security measures, and one of them is installing it. PIN-code SIM-On Xiaomi devices with firmware MIUI This process has its nuances, especially if we are talking about models with dual slots or support for eSIM. Many users mistakenly believe that locking the screen completely protects them from unauthorized access to mobile communications, but this is not true: PIN-code SIM An attacker can easily extract the card and use it in another device.

In this article, we will discuss not only the standard method of activation. PIN-request when turning on the phone, but also alternative methods of protection (for example, through operator settings), and also consider the typical errors that lead to locking. SIM-Special attention will be paid to the features of Xiaomi Redmi, POCO and flagship series Mi/Xiaomi 13/14, If you've ever lost your phone or feared being stolen, this guide will help minimize the risks.

Why you should put a password on SIM-Xiaomi

The main reason is fraud protection. PIN-Anyone who can access your smartphone (or just your phone) SIM-map, can:

• 📞 Call and send SMS from your number, including paid services.
• 💳 Confirm payments through SMS (if the bank account is tied).
• 🔄 Redirect incoming calls to another number (redirection service).
• 📱 Activate SIM in another device if the phone is stolen.

The second reason is compliance with corporate policies, and many companies require employees to protect their workers. SIM-map PIN-And finally, it's just a good habit, even if you don't store sensitive data on your phone, locking it down. SIM Adds a layer of protection in case of theft.

It is worth noting that MIUI by default does not request PIN when enabled (unlike some other firmware, such as the Samsung One) UI). This means that after rebooting or retrieving the battery (on the removable battery models), the network will be automatically accessed, except for cases where the mobile operator has forced this function to be activated on its side.

Preparation: What to Know Before Setup

Before proceeding with activation PIN-code, make sure the following:

Password from Mi Account known (may be required for reset)

Phone number linked to Xiaomi account (for recovery)

You have a backup of your contacts (in case of blocking)

You know. PUK-code (usually indicated on the plastic holder) SIM)

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Pay special attention PUK-Personal Unblocking Key is an 8-digit code that you need to unlock. SIM, If you enter the wrong 3 times in a row PIN. No PUK-You'll have to change the card from the operator, and it's usually on the plastic holder from where you came from. SIM, or in the documents received during the purchase, if PUK lost, contact the operator in advance - some (for example, MTS or Beeline) allow you to know it through your personal account.

Also note that Xiaomi has two SIM-cards (Dual) SIM) You have to do this separately for each slot, and some models (for example, the Redmi Note 12 Pro) will have to be set up separately for each slot.+) Support the dual function PIN, It's a good idea to have different codes for each card. SIM It is used for work and the second for personal purposes.

Yeah, two physical ones. SIM

Yeah, one physical. + eSIM

No, just one SIM.

I don't know what I've got.-->

Step-by-step instruction: how to turn on PIN-request SIM into MIUI

Activation process PIN-The code is the same for most Xiaomi models, but may vary slightly depending on the version. MIUI. Below is a universal guide for the scaling MIUI 12–14:

1. Open the Settings app (the gear icon on the home screen).
2. Go to the Passwords and Security section.
3. Select the Settings item SIM-Cards (or Security) SIM-maps in some versions).
4. Click on the line with your operator's name (e.g. MTS, Tele2). SIM-maps, select the right one.
5. Activate the switch Request PIN-code (or lockdown) SIM-map).
6. Enter the current one. PIN-code (usually 0000 or 1234 by default, unless you have changed it).
7. Come up with a new one. PIN (4 to 8 digits) and confirm it. Avoid simple combinations like 1111 or date of birth.
8. Save the changes and restart the phone to check the locking is working.

If after rebooting the request PIN It doesn't appear, check it out:

• 🔄 Is the slot correctly chosen? SIM-cards (on models with Dual) SIM).
• 📱 Is Quick Booting disabled in the developer settings (may interfere with initialization) SIM).
• 📶 Is there a problem with the card itself (try inserting it into another device).

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If you forget the standard PIN-code (e.g. 0000 is not suitable), try entering the last 4 digits of the phone number or activation date SIM. Some operators set them by default.

Alternative means of protection SIM-map

Besides the standard PIN-In addition, you can use additional security measures on Xiaomi:

One of the most reliable ways is to tie SIM-- The cards to the Xiaomi account:

1. Open Settings → Xiaomi account.
2. Select Devices and Security.
3. Activate Find the device and enable Lock SIM.

If you lose your phone, you can block it. SIM via i.mi.com, even if the attacker has retrieved the card.

Frequent Mistakes and How to Avoid Them

Many users face problems when setting up PIN on SIM These are the most common mistakes:

⚠️ Note: If you entered incorrectly PIN 3 consecutive times, SIM-The card will be blocked and will require PUK-You'll have to change the map without it, don't try to guess the code, you'll have to call in support right away.

• 🔢 Use of simplicity PIN (So, for example, 1234 or 0000, the first thing that scammers do is try these combinations.
• 📵 No backup of contacts. SIM All the numbers saved on it will be lost.
• 🔄 Wrong Selection of Dual Slots SIM. Make sure you configure the card that is used for calls.
• 📡 Ignoring updates MIUI. In older versions of firmware can be bugs with work PIN-request.

Another common problem — SIM-card not asking PIN It's a reboot. It could be because of:

• 🔧 Disabled function Blocking SIM customized.
• 📲 Failure to work MIUI (Helps reset network settings: Settings → SIM-maps and mobile networks → Resetting settings).
• 🛠️ Hardware problems with the module SIM (It is also important for older models, such as Redmi. 4X).

If after all the manipulations PIN-The request never comes up, try it:

1. Remove and re-insert SIM-map.
2. Update MIUI to the latest version.
3. Reset your network settings (don’t forget to save your data!).

How to unlock SIM-map, if you forgot PIN or PUK

If you forgot. PIN-code, you have 3 attempts to enter it correctly. SIM-The card will be blocked and will require PUK-Here's what to do in every situation:

Case 1: Forgotten PIN, but PUK

1. When a request appears PUK Enter it (usually 8 digits).
2. The system will ask you to ask for a new PIN — Think of it and confirm it.
3. Reboot the phone.

Case 2: Forgotten PUK or not.

If you don't know PUK or the operator does not provide it (as with some virtual SIM cards), you will have to:

1. Contact the communication salon with a passport.
2. Order a replacement SIM-Cards (usually free or for a nominal fee).
3. Restore contacts from backup (if it was made).

⚠️ Attention: Never enter PUK-After 10 wrong attempts, code at random. SIM-The card is locked forever and cannot be restored.

Some operators (for example, MegaFon or Beeline) allow you to unlock SIM through a personal account on a website or in a mobile application:

1. Sign in to the operator account.
2. Go to the Control section SIM security.
3. Select the Unblock option. PIN/PUK (name may differ).

Additional security measures for SIM-maps on Xiaomi

Besides the standard PIN-You can increase your protection in the following ways:

• 🔒 Turn it off. USSD-This will prevent fraudulent transfers of money from the account.
• 📵 Set up a lock on outgoing calls to certain numbers (for example, paid services).
• 🔄 Turn on change notifications SIM In your Xiaomi account (attach the number to Find Device).
• 📡 Use it. VPN for SMS (For example, Messages by Google with encryption).

For corporate users, the function of Separation of work and personal data in the MIUI:

1. Open Settings → Special Opportunities → Work Profile.
2. Create a separate profile for the work SIM-map.
3. Set up separate passwords for work and personal data.

If you travel frequently, pay attention to your roaming settings:

• 🌍 Turn off automatic roaming to avoid unexpected payments.
• 📶 Use locally. SIM-temporal-numbered.
• 🔒 Set up expense notifications through the operator app.

💡

Even if you don’t store important data on your phone, you can protect your phone. SIM-map PIN-This code prevents unauthorized use of the card in the event of theft or loss of the device, which is especially critical for corporate users and those who have linked bank cards to the number.

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