Owners of Xiaomi, Redmi and Poco smartphones often face notifications about the device’s encryption in the settings section or when a gadget is reset.This feature is a fundamental element of modern mobile security, turning your personal data into unreadable code for outsiders. Many users wonder whether it should be left on or better off for performance reasons.
Basically, disk encryption is the process of encoding all the information stored on the phone's internal drive without entering the correct input. PIN-File access is not possible even when you connect the device to a computer or try to extract memory, which ensures that in the event of a device being stolen, attackers will not be able to copy your photos or correspondence.
In this article, we will discuss in detail how data protection works on Xiaomi Android devices, what are the risks and benefits of using this feature, you will learn how to properly manage security settings to avoid losing access to your phone, and what to do if the system requires unlocking the bootloader to reset encryption.
The principle of encryption on Android and MIUI
Modern versions of Android, including the MIUI shell and the new HyperOS, use a encryption standard called File-Based Encryption (FBE). Unlike the old method of encrypting the entire drive at once, FBE allows individual files to be encrypted with different keys, which gives the system the ability to run certain background processes, such as receiving notifications or alarms, even when the phone is locked and the user's full data is not yet unlocked.
The key to decrypting data is your lock screen. When you enter a password, the system generates a cryptographic key that unlocks access to the contents of folders. On Xiaomi devices with Qualcomm and MediaTek processors, this process is closely integrated with the hardware security module, making brute-force password selection almost impossible. Without this key, the data looks like a chaotic set of bytes.
⚠️ Warning: If you forget the unlock password on the encrypted device, it will be impossible to recover data, and neither the service center nor special programs can bypass hardware encryption without losing information.
The encryption process is automatically done when you first set up a new smartphone or reset it to factory settings, so you don't have to do complex things manually, and the system itself generates unique keys and binds them to your account and authentication method, creating a level of security comparable to banking security standards.
Why you need encryption: pros and cons of the function
Using device encryption is the de facto standard for modern digital hygiene. The main goal is to protect privacy. If your Xiaomi Redmi Note phone or Xiaomi 14’s flagship gets into the wrong hands, an attacker will not be able to simply connect to memory and read files through special utilities.
But there is a downside to this technology, which is worth knowing: On older or budget smartphones with slow processors and a type of eMMC memory, encryption can significantly slow the interface. Reading and writing operations take time to decrypt on the fly, which can lead to micro-latency when heavy applications are launched.
Let’s consider the main aspects of the effect of encryption on the device:
- 🔒 Data security: Full protection of personal information when physically accessing the device by unauthorized persons.
- 🐢 Performance: On older models, it is possible to reduce the speed of the file system to 10-15%.
- 🔄 Resetting: Unable to easily recover data through Recovery without full formatting.
- 📱 Compatibility: Some older data recovery programs or custom recoveries may not work with encrypted partitioning.
For most users, the security benefits far outweigh the minimal performance losses, especially on modern UFS memory devices. The latest generation of processors have built-in instructions for fast encryption, so the user barely notices the function in everyday use.
How to check the encryption status on Xiaomi
Checking whether encryption is active on your device is fairly simple, and the path to this information may vary slightly depending on the version of MIUI or Android, and these settings are usually hidden in the deep menus of the system, since the average user rarely needs to change this setting manually.
To find status, go to Settings. Scroll down to About Phone. Here you need to find All Options or go straight to Characteristics. Look for the Encrypted Status bar. Some firmware versions may look like Settings → Passwords & Security → Privacy.
If you see "Encrypted," it means that the security is active, which is standard for all modern smartphones, and if it says "Not encrypted," your device is vulnerable to data theft, although new models are almost impossible to encounter this state without root rights and system modifications.
💡
Encryption status can also be checked through the engineering menu by typing the code ##4636##, however, on Xiaomi’s global firmware, this code is often blocked by the manufacturer.
It's important to understand that encryption status is directly related to having a screen lock. If there's no security method (no password or fingerprint) installed on a device, the system can't generate the encryption key, and the data is stored in plain view, so the first step to security is to install a reliable authentication method.
Can I disable encryption and how to do it?
Many users are looking for a way to disable encryption, believing that it will speed up the old smartphone. However, in modern versions of Android (starting with 6.0 and up, and especially on Android 10-14), the forced encryption function is built deep into the system. Just switch the switch in the settings, as it was in the era of Android 4-5, you can no longer.
The only guaranteed way to remove encryption is to completely reset the device to the factory settings (Hard Reset) with simultaneous unlocking of the bootloader. Standard reset via the phone menu often leaves the file structure encrypted, as with the new setup, the system will again prompt you to create a password and encrypt data.
The process of decrypting encryption is as follows:
- Back up all important data as it will be destroyed.
- Apply for unlocking the bootloader via the Mi Unlock app on PC (requires a wait of 3 to 7 days).
- After unlocking the bootloader, execute the formatting command via Fastboot.
There is a myth that there are applications to unseal encryption without losing data. It's a lie. The cryptographic key is stored in a secure memory area and linked to a password. Without a password or without the full formatting of the key (which erases data), access to information is impossible.
⚠️ Warning: Unlocking the bootloader and attempting to format system partitions can result in loss of warranty and disruption of security-dependent features such as Google Pay (Wallet) or banking apps.
☑️ Preparation for decryption
The problem of blocking the bootloader and encryption
Often, users are faced with a situation where the phone requires you to unlock the bootloader to perform certain actions related to encryption or flashing. The bootloader is a program that runs to the operating system and checks the integrity of the software. On Xiaomi devices, it is blocked by default to protect against installing malware.
If you try to install custom recavators (such as TWRP) or other firmware on an encrypted device with a locked bootloader, the process will not succeed.Security will not allow you to change the system partition.Moreover, trying to reset the phone to factory settings on some models can lead to a cyclical reboot if the bootloader is not authorized in Xiaomi servers.
Below is a table showing the impact of the loader state on the user’s capabilities:
| Status of loader | Possibility of flashing | Work of banking applications | Encryption status |
|---|---|---|---|
| Locked (Stock) | Only official OTAs | Works without restrictions | Actively and necessarily |
| Unlocked. | Any firmware and recovery | They may not work (magisk is needed). | You can turn it off when you dump it. |
| Damaged. | The phone won't turn on. | Not applicable. | Data is not available |
To unlock the bootloader, you need to link the account in the phone settings, download the Mi Unlock Tool utility to your computer, transfer the smartphone to Fastboot mode (clamping the volume button when turned on) and follow the instructions of the program. Remember that unlocking the bootloader automatically resets all data on the phone for security purposes.
What is dm-verity?
Frequent problems and errors when working with encryption
One of the most frustrating problems is when the phone gets into a bootloop cycle after a failed password attempt or system failure, and if the device is encrypted and the system can't properly mount the data partition, it can constantly demand a password without running to the end, in which case only logging into Recovery mode helps.
In Recovery (Wipe Data) mode, you often need to enter the unlock password to confirm the reset. If you forget the password and the phone is encrypted, you will find yourself in a vicious circle. The only way out in such cases is Fastboot mode and complete flashing of the device from the computer, which is guaranteed to delete all data.
Also, users sometimes encounter an error "Can't encrypt the phone" when updating the firmware, which can occur due to lack of free space or damage to the file system.
- 💾 Release the minimum 2-3 GB of free space on the internal storage.
- 🔄 Reset settings via Recovery menu before update.
- 📲 Use the official firmware corresponding to the region of the device (Global for Global, CN China).