Why do you need protection? SIM-PIN-code?
According to statistics, every fifth stolen smartphone is used by attackers to commit fraudulent actions through the use of the Internet. SIM-Installation of PIN code on the map SIM In Xiaomi devices (including Redmi lineups, POCO And Mi is a simple but effective way to protect against unauthorized access to the mobile network, even if the phone falls into the wrong hands, without the right code. SIM-The card will remain blocked, and scammers will not be able to call, send SMS or use the mobile Internet.
Many users mistakenly believe that locking the screen of a smartphone is reliable enough. SIM-Cards are protected at a deeper level: it is required every time you reboot your device or retrieve/paste your card.This is especially true for Xiaomi owners, where Dual is a feature. SIM You can use two cards at the same time, each of which can be protected separately.
In this article you will find:
- 🔐 Step-by-step instructions for installing a PIN code on Xiaomi (including hidden settings) MIUI).
- 📱 Differences in procedure for models with MIUI 12/13/14 HyperOS.
- ⚠️ What to do if you forget your PIN code or SIM-map blocked.
- 🔄 How to disable PIN request if it is no longer needed.
Preparation: What to Know Before Installing a PIN Code
Before activating the protection, make sure that:
- 📋 You're on hand. PUK-code (attached to SIM-You'll need it if you enter the wrong PIN 3 times in a row.
- 🔄 SIM-The card is active and connected to the network (otherwise the security menu may not be available).
- 📱 The phone has the latest firmware version (in older versions). MIUI The path to settings may be different).
Important: Default on new SIM-The PIN is disabled, and the standard code is usually "0000" or "1234." If you haven't changed it, anyone with access to the phone can use your phone. SIM-Also note that once the PIN is activated, you have to enter it every time you turn on your phone or restart it.
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If you use two of them SIM-cards on Xiaomi, protect both PINs.Crookers often retrieve the second card if the main one is blocked.
Step-by-step: how to put a PIN code on SIM-Xiaomi
The installation process is the same for most Xiaomi models, but may vary slightly depending on the shell version. Below is a universal algorithm for MIUI 12-14 and HyperOS:
- Open the Settings app (the gear icon on the desktop).
- Go to section. SIM-maps and mobile networks (in some firmware – Mobile network or Dual) SIM).
- Choose. SIM-You want to have a card that you want to use (if you have a dual card). SIM, There will be a choice between SIM 1 and SIM 2).
- Slip on the block item SIM-Cards or Set PIN code SIM.
- Turn on the SIM-card lock switch (if it is turned off).
- Enter the current PIN (the default is “0000” or “1234” if you haven’t changed it). If the code is unknown, see “What to do if you forgot the PIN”.
- Create a new PIN (from 4 to 8 digits) and enter it twice for confirmation.
- Press OK or Save.
I remember a new PIN or recorded it in a safe place.|
PUK-operator code|
The phone is connected to the network (no "no network" icon")|
Second second SIM-The card (if any) is also protected.|-->
Once saved, the phone may request a reboot, from now on, every time the device is turned on or retracted/inserted. SIM-The card will require the entry of a PIN code.
What is it? PUK-code and where to get it?
Features for different versions of MIUI and HyperOS
Depending on the firmware, the path to PIN settings may vary, and below is a comparison table for popular versions:
| Firmware version | The path to PIN settings | Features |
|---|---|---|
| MIUI 12/13 | Settings → SIM-maps and mobile networks → [choose SIM] → Lockdown SIM-map | The menu may be called “SIM protection” or “SIM PIN code”. |
| MIUI 14 | Settings → Connections and sharing → SIM-map → [choose SIM] → Lockdown SIM | The option “Hide blocking notifications” has been added. |
| HyperOS | Settings → Mobile Network → [select SIM] → SIM Security → Install PIN | The interface is simplified, but requires fingerprint confirmation when changing the PIN. |
| Redmi Note 12/13, POCO X5/F5 | Similar to MIUI 14. | On some models there is an option “Request PIN when roaming”. |
On HyperOS devices (such as Xiaomi 14 or Redmi Turbo 3), after installing a PIN, the system can suggest linking the SIM unlock to your fingerprint.This is convenient, but reduces security – if someone accesses your fingerprint (such as through a cast), they will be able to unlock the SIM.
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On HyperOS, after 3 failed PIN attempts, the system will automatically prompt you to enter PUK without waiting for the phone to restart.
What to do if you forget your PIN code or SIM-map blocked
If you have entered the wrong PIN 3 times in a row, SIM-The card will be locked and the phone will require input. PUK-Here's what to do in this situation:
- Find it. PUK-code (see spoiler above) If not, contact the operator: 📞 MTS: *111# or 0890 📞 Beeline: *110# or 0611 📞 MegaFon: *105# or 0500 📞 Tele2: *115# or 611
Enter. PUK-code in the field that appears on the lock screen.
Once you've entered it successfully, the system will suggest you set a new PIN, and you can think of it and type it twice.
⚠️ Note: If you enter incorrectly 10 times PUK, SIM-The card will be permanently blocked, it will have to be replaced in the operator's cabin (free, but you will need a passport!
If you don't remember even PUK, The only way out is to contact the communication salon with a passport. SIM-same number card, but:
- 🔄 All saved on the old one. SIM contact SMS will be lost.
- 🕒 The replacement process takes from 10 minutes to a day (depends on the operator).
- 💳 Some operators charge a replacement fee (for example, Beeline - up to 100 rubles).
How to disable PIN code on SIM-mapping
If you no longer need protection (for example, you sell a phone or a phone) SIM-map), disable the PIN request can be so:
- Go to Settings. → SIM-maps and mobile networks → [choose SIM] → Lockdown SIM-map.
- Turn off the SIM-card lock switch.
- Enter the current PIN code for confirmation.
- Confirm the shutdown (the system may alert you to the risks).
After that SIM-The card will be unlocked and the PIN will not be requested, but the standard PIN ("0000" or "1234") will remain active and can be turned on again at any time.
⚠️ Warning: Disabling the PIN before selling the phone doesn't reset it! the new owner will be able to turn on the protection knowing the standard code. To completely remove the PIN, contact the operator.
Additional security measures for SIM-maps on Xiaomi
Installing a PIN is just the first step, to protect your security as much as possible. SIM-Map on Xiaomi, Follow These Tips:
- 🔄 Disable auto-connection to open Wi-Fi networks. Fraudsters can replace the network and intercept SMS confirmation-coded.
- 📱 Set up the lock screen, even with the lock. SIM An attacker can access phone data if the screen is not protected.
- 🔐 Use Xiaomi's Security app. It has a Security feature. SIM», Notify of suspicious activity (e.g., attempt to change number).
- 📞 Activate the operator's "Disallow Number Change" service, which will prevent fraudulent replacement. SIM fake passport.
For owners of Xiaomi with HyperOS, the “Private Mode” function is available, which hides notifications from the user SIM-I'm going to put a card on a locked screen:
- Go to Settings → Notifications → Privacy Notifications.
- Select Hide the contents of notifications on the lock screen.
- Activate the option for Phone and Messages applications.
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If you travel frequently, enable the option “PIN Request when roaming” in the SIM settings. This will protect against unauthorized use of the card abroad.