Resale of a smartphone is a process that requires not only an assessment of the market value of the device, but also careful preparation of its software. The owner must ensure that no personal photo, password from the banking application or stored Wi-Fi will not be obtained by the new owner. Simply deleting files through the file manager is not enough, since modern methods of data recovery allow you to extract information even after formatting.
In the Xiaomi ecosystem, the cleaning process has its own unique features, which are related to the security of the Mi Account. If you just perform a standard reset without untiing the device from the cloud account, the new user will face an activation lock. It's a security mechanism against theft that will turn the sold phone into a useless brick for the buyer. So the approach must be comprehensive and consistent.
In this article, we will look at all the steps in preparing a gadget for transfer to a new owner, we will look at manual deletion of data, the critical procedure for detachment from your Mi and Google account, and methods of hard resetting through the Recovery menu, following these steps will protect your digital privacy and save the buyer from unnecessary technical problems.
Pre-training and backup
Before we embark on radical data destruction measures, we need to make a full copy of it, and many users neglect this step, relying on cloud services that may not be fully synchronized, and make sure that all important contacts, notes, and calendars are transferred to Google servers or locally stored in a file.
To create a backup of media and documents, the best way to use the built-in Explorer app or third-party file managers is to copy DCIM, MIUI, Download and Documents folders to a computer or external drive. Pay special attention to messenger folders, where important work files are often stored.
- 📸 Check the gallery for hidden albums and folders that are often forgotten to clean.
- 💳 Log out of all banking and payment systems (Google Pay, Mi Pay) applications by pre-deleting the associated cards.
- 🔑 Save two-factor authentication codes if they are stored in generator applications on that device.
⚠️ Warning: Don’t forget to check the lists of authorized devices in Google and Mi accounts. Deleting your smartphone from the list of trusted devices on the server will prevent login problems from new gadgets in the future.
Once the data is transferred, it is recommended to check its integrity on a new medium, make sure that the photos are opened and the contacts are imported correctly, and only after confirming the successful reservation can you proceed to the next stage.
Decoupling from Mi and Google: a critical stage
The most important step that is often ignored is manually deleting accounts from the system, Xiaomi and Redmi smartphones have anti-theft protection, and if the phone is not untied from Mi Account before resetting, the system will require a password to be entered from this account when the new owner first activates, without a password, the device will not be able to use.
To do this, go to your phone's settings. Find the account section. Depending on the version of MIUI or HyperOS, the path may vary slightly, but the logic remains the same. You need to find a list of all the accounts you've added and delete them sequentially.
What is FRP and why is it important?
The process of deleting the Mi Account is as follows:
- Open the Settings.
- Go to Accounts and Sync (or just Accounts).
- Select the Mi Account item.
- Click the Delete Account button (at the bottom of the screen).
- Enter the password from the account for confirmation.
A similar operation is performed with a Google account: Find your Gmail address in the list, click on it and select Delete Account, which will break the device’s connection to Google servers, allowing the new owner to set up the phone as a new one without asking for your data.
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If you sell a phone with a broken screen but it turns on, be sure to plug in to it. USB-mouse-wise OTG-adapter to be able to go through the detachment procedure of accounts through the settings menu.
Complete reset via the settings menu (Soft Reset)
Once all accounts are deleted and the data is copied, you can begin to clean the internal memory directly, and the safest and most recommended way is to use the operating system’s standard functionality, which ensures that all system processes are completed correctly and that partitions are formatted correctly.
To start the procedure, go to the settings menu. Depending on the version of the shell, look for the About Phone or Advanced Settings section. You will need to find the Reset option. The system will warn you that all data will be deleted.
| Parameter | Description of action | Risk of data loss |
|---|---|---|
| Resetting settings | Returns system settings to factory settings, deletes accounts | High (deletes all user data) |
| Erase all data (Erase all data) | Full formatting of internal memory | Critical (recovery is impossible) |
| Resetting Wi-Fi and Bluetooth settings | Remove only network configurations | Low (photos and contacts remain) |
You'll see a few options in the reset menu. We're interested in a complete cleanup. Often there's a "Clear internal storage" or "Erase all data" switch. Be sure to activate it. If you don't, the phone will only reset the settings, but the files will stay in place.
After clicking the Reset button (or “Erase all data”), the phone will request confirmation in the form of a pattern lock, PIN-This is the final protection against accidental launch, and once confirmed, the device will restart and the cleaning process will begin, which can take 5 to 15 minutes.
☑️ Checklist before final reset
Alternative method: reset via Recovery Mode
If the phone is not turning on normally, the lock password is forgotten or the system is unstable, the recovery mode is used, which is deeper and allows you to erase data even when the operating system is not working, but it does not replace the detachment procedure described above.
To enter Recovery mode on the device turned off, press both the power button and the volume button. Hold them until the Mi logo or Recovery menu appears. This menu is controlled by volume buttons (up/down), and the choice is confirmed by the power button.
- 🔻 Select a language (usually Available languages -> English/Chinese).
- 🗑️ Find the Wipe Data Item.
- ✅ Confirm your choice by selecting Wipe All Data.
- 🔄 Wait for the process to end and select Reboot.
⚠️ Note: Recovery resets do not remove the Mi Account binding if it was active before the reset.If you did not delete the account through the settings in advance, the phone will require the Mi Account password after the reboot, even after the full reset is cleared through Recovery.
This method is useful when software resetting through settings is not possible. In other cases, it is preferable to use a regular menu, since it is less stressful for the file system and ensures that the application cache is cleaned correctly.
Cleaning of external memory and SIM-map
Many users forget about the microSD card, which can contain gigabytes of personal information. Internal reset of the phone does not affect external drives. Before selling the memory card, you must either format separately on the computer or format through the phone menu before removing it.
And we should also not forget about it. SIM-The map, though modern. SIM-Cards rarely store contacts (they sync with the account), they may remain old SMS-Messages or data about recent calls. SIM-card before any reset operations are started so as not to accidentally damage it or knock down network settings during the reboot.
If you plan to give the memory card to a new owner in the kit, format it into the exFAT file system or FAT32 You can do this through the Settings menu. → Warehouse → SD-map → Format before general resetting of the phone.
Final inspection and packaging
Once the erasure process is complete and the phone has restarted, you will see a welcome screen with a choice of language, which means that the device is ready to sell. Don't set it up to the end, don't connect to Wi-Fi or enter any data. The ideal state to sell is the out-of-the-box state.
Visually inspect the device. Wipe the screen and body with microfiber to remove fingerprints. Lack of fingerprints and dust creates a new device feel and enhances its liquidity. Pack the phone in the original box along with cables and documents, if any.
Make sure you don’t forget to remove the tray. SIM-An empty tray or, worse, a forgotten SIM card can be confusing to the buyer, and check if the security film is still on the screen if you plan to leave it, or remove it if it bubbles and spoils the view.
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Save a checklist of actions taken or take a screenshot of the welcome screen (if possible) to show the customer that the phone has been fully cleaned professionally and is ready for the first activation.
Now your Xiaomi is fully ready to be transferred to a new owner, you have secured your data, prevented possible problems with blocking accounts, and provided a comfortable start to the customer using the device, honesty and technical literacy in the sale is the key to a positive reputation of the seller.