Xiaomi smartphone owners often face the need to change the security codes, whether it is standard. PIN-code SIM-The security of personal data in a modern smartphone comes first, and the ability to manage these parameters is a basic skill of each user. Incorrectly entered code can lead to the blocking of the SIM card or even the entire device, so it is important to understand the differences between the two.
In this article, we will discuss in detail how to change the code to Xiaomi in different situations: from a simple change PIN-code through settings prior to unlocking PUK-You'll learn where the factory passwords are stored and how to protect your gadget from unauthorized access. PUK-The code is always listed on the plastic card-based card on which your SIM-card.
Differences between PIN, PUK and screen password
Before you make any changes, you need to be clear about what codes your smartphone protects. PIN-code SIM-cards with a password to unlock the screen, which leads to unnecessary panic when blocking. PIN-code is requested by the system immediately after turning on the phone, even before the operating system loads MIUI.
If you enter three times incorrectly PIN, SIM card will be blocked and the system will require PUK-This is an eight-digit key that is issued by the carrier and cannot be changed by the user, unlike the user, the screen password or pattern lock is set by the owner to protect the interface and applications.
There is also a Mi Account access code that is linked to cloud services and Find Device, which is changed through the web interface or account settings and affects access to cloud storage and sync.
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Write it down. PUK-It's more difficult to recover the code from the operator than just to find the record.
How to change PIN-code SIM-maps on Xiaomi
Shift. PIN-It's a simple procedure that takes less than a minute, and you don't need third-party apps or internet access to do that, because it's managed at the Android system level. PIN-code activated.
Navigation may vary slightly depending on the MIUI version, but the logic remains the same for all Xiaomi, Redmi and Poco models.
You need to find the section that's responsible for the security of SIM cards, and the path is usually as follows:
- 📱 Open the Settings.
- 🔒 Go to the Passwords and Security section.
- 📡 Select the Privacy item SIM-card SIM-map.
- 🔄 Click on the active SIM card and select Change PIN-code.
The system will ask you to enter the current PIN-code (by default, often 0000 or 1234, If you haven't changed it, then you'll be asked to enter a new code after you've successfully authorized it, and then you'll be asked to re-enter it. 4-8 figure.
☑️ Shift. PIN-code
Unlocking PUK-lock-in SIM
When the phone is required to PUK-The code occurs after three failed attempts to enter PIN. This is a security mechanism that prevents the theft of data from the SIM card. PUK-Don’t panic, but act carefully.
You only have 10 attempts to enter the right one. PUK-Once the limit is exhausted, the SIM card is permanently blocked, and it will not be possible to restore it - you will have to get a new one from the operator.
Where to find out. PUK-code:
- 📄 On a plastic card-based, which came complete with a SIM card (usually hidden under a protective layer).
- 💻 In the personal account of the subscriber on the website of your mobile operator.
- 📞 Calling the operator’s support service from another phone.
Unlocking process on Xiaomi is standard: enter 8-digit PUK-code, then create and enter a new one PIN-If the code is accepted, the SIM card will be unlocked and the phone will start searching for the network.
⚠️ Attention: Never enter PUK-A single-digit error reduces the attempt counter, and 10 errors make the SIM card unusable.
Setting up the password and graphical screen key
Protecting the MIUI itself is the first line of defense against prying eyes. You can use a digital password, a pattern lock, a fingerprint, or facial recognition. To change your password or key, go to Settings → Passwords and Security → Device Protection.
If you want to change your current unlock method, the system will require you to enter your current password, then you can choose a new type of protection, and it is recommended to use a mixed password (numbers and letters) for maximum security, although a complex pattern lock is often enough for everyday use.
In the same menu, you can configure Smart Lock, a feature that allows you to keep your phone unlocked in trusted places or when you connect to certain devices, such as the Mi Band smartwatch or car stereo.
What to do if you forget your screen password?
Changing the Mi Account Password
Mi-account is your digital passport in the Xiaomi ecosystem, which syncs contacts, search for lost devices and cloud storage, and change passwords regularly to improve security.
You can change your password directly in your smartphone settings or through your browser. On the phone menu, the path looks like this: Settings → Mi-acca → Account security. Here you can update your data, link your phone number and backup email.
When changing a password, it is important that the new access key is different from the previous one and does not contain obvious sequences (for example, 123456).
| Type of code | Wherever used | Who's giving it away? | It can change. |
|---|---|---|---|
| PIN-code | Access to SIM-map | Operator (standard) | Yes. |
| PUK-code | Unlocking the SIM | Communications operator | No (permanent) |
| Screen password | Unlocking the smartphone | User | Yes. |
| Mi Account password | Cloud services | User | Yes. |
Special codes and engineering menu
In Android and shell system MIUI There are special service codes that start with characters and #. They allow you to quickly navigate to hidden menus or check the status of the device. IMEI-Phone number that may be needed when the operator locks the lost device.
There is also a code to log into the engineering menu, but on modern global versions of Xiaomi firmware, access to it is often closed or limited. Trying to change the parameters in the engineering menu without knowledge can lead to incorrect operation of communication modules.
To check the status of a network lock or change network settings, a standard settings menu is usually enough. Using third-party applications for “code change” is not recommended, as they often contain advertising or malicious code.
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Service codes are a powerful diagnostic tool, but their reckless use can disrupt the radio module or reset important network settings.