Selling a smartphone is not only a way to get the desired amount, but also a serious responsibility for the safety of your personal data. Owners Xiaomi, Redmi and POCO often face the question of how to guarantee the removal of all information so that the new owner does not get access to photos, correspondence or passwords of banking applications. Simply deleting files is not enough, since they are easy to restore special utilities.
In this article, we will discuss in detail the process of preparing the device for transfer to a new owner, you will learn why it is critically important to untie the Mi Account, how to correctly perform a full reset, and which hidden memory areas require attention.
Modern smartphones store vast amounts of sensitive information, from geolocation to stored access keys. Ignoring the cleanup steps can lead to data leakage that can then be impossible to control, so a number of mandatory procedures must be followed before you put a lot on the ad platform.
Data preparation and backup
The first step before cleaning is to store important information. Many users make the mistake of starting a reset without checking cloud storage or local backups. Make sure your contacts, call history and messages are copied.
For Android ecosystem owners, syncing with Google Account is the most convenient way to do this, check when you last backed up by going to your settings, and save photos and videos separately, as they take up the most memory.
Don’t forget about messenger files. WhatsApp, Telegram and Viber store the history of correspondence and media files in separate folders that do not always fall into the general backup of the system. Do export chats or make sure that the cloud copy in the messenger account is relevant.
- 📸 Back up the gallery to your computer or external hard drive for reliability.
- ☁️ Check the synchronization status in the Settings section → Google → Backup.
- 💬 Export important dialogues from messengers to avoid losing history.
- 🔑 Save two-factor authentication codes if they are only linked to that device.
⚠️ Note: Once the reset is completed, it will not be possible to recover the data without a pre-created copy.
If you're using Mi Cloud, make sure the sync is complete. Often users forget that new photos haven't yet been uploaded to the cloud due to unstable Wi-Fi. Wait until the process is complete before moving on to the next step.
Account unbundling and protection against activation blocking
The most critical moment in Xiaomi’s preparation for sale is the unbundling of accounts, which, unlike some other brands, are strictly tied to Mi Account, and if you don’t log out before resetting, theft protection will turn on, and the new owner will not be able to activate the device.
Activation Lock is a security mechanism that requires the previous owner to enter their login and password when first set up, and it is almost impossible to circumvent it in legal ways, turning the phone sold into a brick for the buyer.
To unbundle properly, you need to manually log out of all profiles, not only your Xiaomi account, but also your Google Account, as well as Samsung accounts (if used) and various antivirus programs, and having any active profile can cause resale problems.
☑️ Checklist before reset
The process of leaving Mi Account requires an Internet connection. Go to settings, find the partition with the account and click the "Off" button. The system can request a password to confirm the operation. Make sure that the device has access to the network at this point.
What to do if you forget your Mi Account password?
You should also delete saved passwords in Chrome or Mi Browser. Although they should be deleted when reset, manually checking the Autocomplete section in Google’s settings will give an additional guarantee that your access to the sites will not leak.
Encrypting data before resetting
Many users are unaware that on modern Android smartphones, data can already be encrypted by default, however, for devices older than 2-3 years or models with an outdated version of MIUI, it is recommended to conduct forced encryption before cleaning.
The point of this procedure is that in a normal deletion, files are marked as "free space" but physically remain on the drive until overwriting, and encryption stirs the data with a key that is erased when reset, making it impossible to restore the information even theoretically.
To check encryption status or run it, go to Settings → About Phone → All Specifications (or Security Section). If the phone is new, it is likely already protected. For older models, this feature may be in the “Advanced” menu or require you to set a lock screen password.
- 🔐 Set a complex password or graphical key before encryption to create a strong decryption key.
- ⏳ The encryption process can take anywhere from 30 minutes to several hours depending on the amount of memory.
- 🔋 Be sure to connect your smartphone to the charger during the operation.
- 📱 Do not interrupt the process or turn off the screen unnecessarily to avoid damaging the file system.
Once encryption is complete, the data becomes unreadable without the key, and when you reset, the key will be destroyed, and the remaining "fragments" of files on the disk will turn into digital noise that cannot be put together.
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Before encryption, free up at least 20% of the device’s memory, which will speed up the process and reduce the risk of errors when moving data blocks.
Complete reset (Factory Reset)
When all the data is saved and the accounts are untied, you can start the main action, Factory Reset, which is the standard procedure for returning the device to a factory state, and it is quite simple in the MIUI interface, but it requires care.
Go to Settings → About Phone → Reset. The system will offer two options: Reset (system settings only) and Erase all data (complete cleaning).
When you choose to erase completely, the system will again alert you to the loss of data and request the screen unlock password, which is the final security barrier, and once confirmed, a process that can last from 5 to 15 minutes will begin.
| Type of discharge | What's removed | Implementation time | Risk of recovery |
|---|---|---|---|
| Resetting settings | System settings, Wi-Fi, alarm clocks | 1-2 minutes | High (data remains) |
| Erase all data | Photos, apps, accounts, files | 5-15 minutes | Low (when encrypted) |
| Recovery Mode (Wipe Data) | Complete cleaning of user partitions | 5-10 minutes | Low. |
| Fastboot (Flash) | Complete flashing of the device | 10-20 minutes. | Minimum |
It's important to wait until the process is complete. The phone can reboot several times, the screen can go out and light up. Don't press the buttons at this point so as not to interrupt the memory partitions.
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The ideal reset result is a Welcome screen, like when you first turn on a new phone out of the box.
Alternative method: reset via Recovery Mode
If the system interface is damaged or you want to be sure of deep cleaning, you can use Recovery Recovery mode, which works independently of the operating system and allows partitions to be cleaned at a lower level.
To enter this mode, you need to turn off your phone and press the button combination. On most Xiaomi models, this is Volume Up + Power. Hold them until the Mi logo or recovery menu appears.
In the menu, the navigation is done with volume buttons and the choice is made with a power button (or touch if the screen responds). Select a language (if available), then go to Wipe Data and confirm the action of Wipe All Data.
⚠️ Note: In Recovery mode, the touch screen may not work. In advance, check which button is responsible for confirming (usually an on button) on your model.
This is especially useful if you have forgotten your pattern lock or lock screen password and can’t log into the settings menu for a normal reset, but it doesn’t remove the Mi Account lock if your phone was previously tied to it.
Once the cleanup in Recovery is complete, the phone will prompt a reboot.The first run may take longer than usual, as the system will recreate the file structure.
Final inspection and packaging
Once the phone has rebooted and you have seen the welcome screen, take your time packing it.Take the initial setup steps to your desktop to make sure there are no errors and residual files.
Check if your phone has requested activation via Google Account or Mi Account, and if you have a request, you have made a mistake in unsetting, and you need to reset, and the clean phone should let you log in without entering old passwords.
Make sure there is no leftover on the device. SIM-MicroSD cards and memory cards. Often users forget to remove the flash drive, which may contain personal archives, and wipe the case and screen with a soft cloth to make the presentation match the description.
- 🧹 Wipe the charging connectors and speaker with a soft brush from dust.
- 📦 Find the original box and cable, if they are preserved – it will increase the price.
- 📸 Take up-to-date photos of the device to announce the sale.
- 🔍 Check the screen for “burnouts” or broken pixels when the white screensaver is turned on.
Now your Xiaomi is ready to sell, you've taken all the necessary steps to protect your data and have the new owner have a clean device ready to go, and it's not only ethical, it's professional.