Xiaomi SIM activation data: what it is, why you need it and how to get it

If you are familiar with the term “Xiaomi activation data” SIM», most likely, we are talking about the process of unlocking the smartphone after resetting the settings, replacing it. SIM-This mechanism is part of the Mi Account security system that binds the device to the previous owner's account, and without the right activation data, the phone can turn into a brick, blocking access to the network, applications and even basic functions.

In this article, we will discuss in detail: what is activation data (and why it appears on Xiaomi), in which cases they are requested (after resetting, firmware or changing the SIM), legal ways of obtaining them (from official support to bypassing through the engineering menu),

As well as the risks of using dubious services that promise “unlock in 5 minutes”, we will pay special attention to the nuances for models with Qualcomm and Mediatek, where the process may be different.

What is Xiaomi SIM activation data?

SIM activation data is a unique digital “key” that is generated when a Xiaomi smartphone is first linked to a Mi Account, stored in the device’s Protected Memory Area (EEPROM) and used to verify the legitimacy of the owner when:

• 🔄 Reset to factory settings (if you did not exit from Mi Account).
• 📱 Replacement SIM-cards (on some models with reference to the operator).
• 🔧 Fastboot flashing (if the firmware is not official).
• 🛠️ Replacement of motherboard (requires the transfer of activation data).

It’s essentially a piece of anti-theft protection similar to the iCloud Lock on the iPhone. However, unlike Apple, Xiaomi doesn’t always clearly inform users about the need to untie their account before selling the device, resulting in new owners being asked for activation data without access to it.

Important: Activation data is NOT the same as the Mi Account password or PIN-code SIM-This is a separate 16- or 32-digit code that is generated by Xiaomi servers when the device is first activated.

When is activation data requested?

The system may require the input of activation data in the following scenarios:

For example, if you bought Xiaomi Redmi Note 12 from hand and performed a reset via Settings → Reset → Delete all data, but the previous owner did not log out of Mi Account, the system will request activation data when you first try to connect to Wi-Fi or insert SIM-map.

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Before buying used Xiaomi always ask the seller to reset directly with you and check the absence of binding to Mi Account. To do this, go to Settings → Xiaomi Account – there should not be someone else’s account.

Official methods of obtaining activation data

If you are a legitimate device owner (for example, you lost access to your Mi Account), you can try to recover the activation data through official channels:

1. Appeal in support of Xiaomi

The most reliable, but the longest way.

• 📄 Check or warranty card with serial number of the device.
• 🆔 Identity document (passport).
• 📧 A letter in English or Chinese describing the problem (a sample can be found on the forums) 4PDA or XDA).

The answer may come through 3–14 Support addresses: support@mi.com (international), service.ru@xiaomi.com (for Russia).

2. through an authorized service center

If you have a box and documents on your phone, Xiaomi service center can reset the binding to Mi Account through internal tools.

3. Recovery via Mi Account (if your account is yours)

If your phone is linked to your Mi Account but you have forgotten your password:

1. Go to account.xiaomi.com.
2. Click on “Forgot your password?” and follow the instructions (you will need an email or phone attached to your account).
3. After restoring access, log into your account on your phone - the lock will be removed automatically.

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The official methods only work for legitimate owners, and if you bought a phone from hand without a Mi Account, these methods won't help, they'll require alternative solutions.

Unofficial methods of bypassing the lock (at your own risk)

If official methods are not available, users resort to alternative methods, and we do not recommend using them, as they can:

• 🚨 Breaking the guarantee.
• 🔓 Bring to full lock of the device (if you make a mistake in the process).
• 🕵️ Become a cause of data leakage (when using dubious services).

However, let’s look at the most common options:

1.Use of the engineering menu (#4636##)

On some models (e.g. Redmi 9A or POCO M3) you can try to reset the lock via the engineering menu:

1. Enter in the dialer: ##4636##


2 Go to the section "Phone Information".




3. Find the Debugging item and turn on the OEM Unlock.




4. Go back to the basic settings and perform the reset.

⚠️ Note: This method only works on 30% of models and can result in resetting. IMEI.

2. Firmware through Fastboot with Mi Account Deletion

For power users, there is a way to flash the device through Fastboot, removing the activation data.

• 🖥️ Computer with Qualcomm or Mediatek drivers installed.
• 📁.tgz firmware for your model (download from xiaomifirmwareupdater.com).
• 🔧 The Mi Flash Tool or SP Flash Tool.

Instructions:

1. Turn off the phone and press Volume Down + Power to go to Fastboot.
2. Connect to your PC and start the Mi Flash Tool.
3. Select the firmware and press Clean All (NOT Clean All and Lock!).
4. Wait until the process is completed (10-15 minutes).

Download the official firmware for your model |

Install Qualcomm/Mediatek | drivers

Backup data (if the phone is still working) |

Charge your phone at least 50% |

Prepare. USB-cable (preferably original)

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⚠️ Note: on models with Mediatek (e.g. Redmi) 10A) After that, it might be a bit off. IMEI. It can only be restored through SN Writer Tool with Mediatek authorization (cost) ~$10).

3. Paid unlocking services

There are many services on the Internet offering to “delete Mi Account in 5 minutes”, prices vary from 500 to 3000 rubles.

• 💳 Fraud (payment without result).
• 📱 Damage to the device (incorrect firmware).
• 🔒 Data Leakage (if the service requires access to the account).

If you decide, choose services with feedback on 4PDA or XDA and payment through secure systems (for example, Qiwi with a return guarantee).

Xiaomi models most susceptible to lockdown

Not all Xiaomi smartphones are equally rigorous in checking activation data, with the most problematic models (according to 4PDA and XDA data for 2023-2026):

For example, the Redmi Note 11 Pro+ 5G It is often blocked after being flashed through Fastboot, unless you use official global firmware. POCO M4 Pro can request activation data even after replacement SIM-cards, if previously linked to a Chinese operator.

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Before buying used Xiaomi, check the model on imei.info. If the name has CN (China) or IN (India), there is a high probability of activation problems.

What do you do if nothing helps?

If all methods are exhausted, and the phone remains locked, there are several options:

1. Sell the device for parts: A working display, battery or camera can bring up to 30-50% of the cost of a new phone.
2. Use as a media player. Some features (e.g., watching videos via USB-OTG) can work even without activation.
3. Turn to the "gray" masters. There are specialists in major cities who will unlock Xiaomi through EDL-regime (cost) ~2,000–4,000 rubles. Risk: loss of warranty and possible problems with the IMEI.

⚠️ Warning: If a phone is stolen, no legal means will unlock it, and in such cases, the device will remain a brick forever, as part of Xiaomi’s anti-theft policy.

FAQ: Frequent questions about Xiaomi SIM activation data