Selling a used smartphone is a process that requires not only finding a buyer, but also carefully preparing the device itself. Owner Xiaomi or Redmi must make sure that no personal photo, saved password or bank details are not obtained by the new owner. Simply deleting files through the file manager is not enough, since modern data recovery methods allow you to return deleted information without much effort.
The procedure for completely cleaning an Android smartphone involves not only formatting memory, but also detaching from cloud services, which is a critical step for the Miui ecosystem. If you ignore this step, the new owner will face a blockage of activation, and you risk losing control of your Mi Account. In this guide, we will examine every step of preparing the gadget for transfer to another person.
It's important to understand that the memory algorithms in today's Snapdragon and MediaTek processors are designed so that data doesn't disappear instantly, they're marked as free space, but they're physically left on the media until the time they're overwritten, which is why the standard reset procedure needs to be supplemented with additional security measures, which we'll talk about later.
Backup of important data and media files
Before embarking on radical cleanup actions, you need to create a full copy of all valuable information. Users often forget about hidden folders, messenger cache and stored files in system directories. Backup is the only way to save memories and working documents before destroying local data on the device.
The easiest way to save contacts and calendar is to sync with your Google account, but for multimedia and documents, this will not be enough. It is recommended to use Mi Cloud cloud storage or third-party services like Yandex.Disk if the data volume is large. Remember to check the Download folder and the WhatsApp/Media directory, where gigabytes of forgotten files are often accumulated.
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Before reset, be sure to take screenshots of important settings or take a picture of the screen with QR-Two-factor authentication codes if you don’t have access to a backup phone.
To create a local copy, use the built-in Security or Settings app. → The phone. → Backup and recovery. This tool allows you to save even the placement of icons on the desktop and setting alarms. SD-map SIM-card, if installed, as the reset may affect their contents when selecting the appropriate option.
☑️ Preparation of a backup copy
Decoupling from Google and Mi Cloud accounts
One of the most critical steps is to exit all registered accounts. Android security system called Factory Reset Protection (FRP) locks the device after a reset if it was linked to a Google account. Without entering a password from this account, the phone will turn into a "brick" for the new owner.
Xiaomi and Redmi owners also need to pay special attention to the Mi Account. If you do not log out of the Mi Cloud before resetting, the protection against theft will work, and the device will require you to enter a password from the Mi Account on the first activation.
⚠️ Note: If you simply perform a reset without logging out of your accounts first, the device may be permanently locked if you forget passwords or can’t access the phone number tied to your account.
To unplug, go to Settings → Accounts and Sync. Here, select each account (Google, Mi, Exchange, etc.) sequentially and click on Delete Account or Sign Out. Only after the list is empty can you proceed to the next step, ensuring that FRP is not activated after the reboot.
What to do if you forget your Mi Account password?
Step-by-step instructions for resetting to factory settings
Once the accounts are ready and unloaded, the moment of truth comes: a complete system reset, which is as automated as possible in MIUI or HyperOS, but requires careful consideration when selecting the cleaning options, and the operation will remove all apps, settings and user files, returning the smartphone to the "out of the box" state.
There are two main ways to do this: through the settings menu and through the Recovery mode. The first option is preferred for most users, as it is safe and understandable. The second option (Recovery Mode) is used if the system is unstable or does not boot.
To reset through the settings, follow the following steps:
- 📱 Open the Settings app and scroll down to About Phone item.
- 🔄 Select the option Resetting (or "Factory Resetting").
- 🗑️ Click the button to erase all data and confirm the action with the unlock code of the screen.
- ⏳ Wait for the process to be completed, which can take between 5 and 15 minutes depending on the amount of memory you have.
It is important to note that before starting the reset, the battery should be at least 50%. If the device is turned off due to a discharge during the data erasure, the file system may be damaged, which will lead to errors when booting. Also make sure that you are not connected to an unstable Wi-Fi network, although the reset is locally, some services may try to synchronize status.
Using Recovery Mode for Deep Cleaning
Recovery Mode is a special diagnostic interface built into Android firmware that allows you to perform low-level operations with the system, including full partition Wipe, a method often used when standard resetting through settings is impossible or fails.
To enter this mode on most Xiaomi and Redmi models, you need to turn off the phone and then press the volume button and power button simultaneously. Hold them until the Mi logo or menu in English appears. Navigation is done with volume buttons, and the choice is confirmed by the power button.
From the Recovery menu, select Wipe Data, then Wipe All Data. The system will request confirmation, often requiring you to press Confirm several times. Once you complete the operation, select Reboot → Reboot to System. This method ensures that even some system caches that may have remained during a normal reset will be cleared.
| Parameter | Reset via Settings | Reset via Recovery |
|---|---|---|
| Difficulty | Low. | Medium |
| Requires the phone to be turned on | Yes. | No. |
| Depth of cleaning | Standard. | Maximum |
| Risk of error | Minimum | Medium (with incorrect actions) |
⚠️ Note: In Recovery mode, the interface may differ depending on the version MIUI. Be careful with menu items marked as “Wipe” – they permanently delete data without the ability to recover through the shopping cart.
Checking for hidden data and debris
Even after a reset, there are nuances to be aware of, like if you've used the "Second Space" or "Hidden Albums" feature, make sure they've been removed before the main reset. While a full vape should affect all sections, manual checks before selling will give you confidence.
Pay attention to paired Bluetooth devices and paired Mi Home gadgets. If you sell a phone but keep a smartwatch or headphones, be sure to remove the phone from the list of trusted devices in companion apps.This will prevent attempts to automatically connect to the sold device in the future.
It’s also worth checking if the device has apps with active sessions in the background if you haven’t done a full reset, just a clean. A full reset is required for sale, but visual control after turning on (at the welcome stage) will show if the phone will ask for old passwords.
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A complete reset removes data from all partitions of user memory, including hidden folders and cache of system applications, making data recovery extremely difficult for the average user.
Physical cleaning and preparation for transfer
The look and feel of the device is important when you sell it. After the software cleansing, you need to take care of the physical condition of the case and screen, use microfiber and special wipes for screens to remove fingerprints and fat spots, and do not use aggressive chemicals or alcohol in its pure form, as they can damage the oleophobic coating of the matrix.
Pay special attention to USB-C charging ports and speakers. There often accumulates dust and pile, which create a sense of careless use. Carefully clean the holes with a dry soft brush or compressed air. A clean charging port also ensures that the new owner can charge the device without hindrance on the first meeting.
If the phone comes with the original box, cable and power supply, wipe them too. The package increases the liquidity of the product. Pack the phone so that it does not damage during transportation if you send it by delivery. The screen is better protected with temporary film or soft cloth to avoid micro scratches.