Smartphone sales are always stressful, not only because of parting with a familiar gadget, but also because of the risk of leakage of confidential information. Xiaomi device owners, working on the shells of MIUI or HyperOS, face unique ecosystem features, ignoring which can lock the device to a new owner or leave your personal data available.
Many users make the critical mistake of thinking that simply deleting files or even resetting settings is enough to completely anonymize. In fact, linking to Mi Account creates a layer of protection that, without properly unlocking, turns the phone into a brick after being flashed by a customer. It is important to understand the security architecture of Android and the specifics of the Chinese manufacturer's cloud services.
In this article, we will discuss a detailed algorithm that will protect your banking applications, photos and correspondence. We will look not only at the software reset, but also at the physical aspects of preparing the device for transfer to a new owner.
Preparation of accounts and cloud services
The first and most important step is to untie the device from your digital identity. Xiaomi ecosystem is deeply integrated with cloud services, and simply leaving the settings menu is often not enough to completely break the connection. If you sell the phone without doing this, the new owner will not be able to activate the device, because the protection against theft will work.
Users often forget that their account remains active at the server level, even if they have deleted the application from their phone, and account deletion must occur in a strictly defined order to avoid blocking.
Follow the following steps to clean your accounts completely:
- 🔐 Open Settings and go to the Mi Account section, then click "Exit" and enter the password to confirm.
- ☁️ Go to Google Settings, select your profile and click “Delete Account” from this particular device to break sync.
- 📱 Check out third-party clouds like Yandex.Disk or Dropbox and log out of all apps.
⚠️ Warning: If you don't remember the Mi Account password, restore it before resetting. After formatting, it won't be possible to restore access, and the phone will remain locked.
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Take a screenshot of the list of installed apps before selling – this will help you not forget what programs will need to be installed on the new phone.
You should pay special attention to two-factor authentication. SMS For this number for other services, make sure that SIM-The card will be transferred to the new device immediately after the sale, or change the confirmation method in advance.
Backup and Cleanup of Multimedia
Once accounts are unloaded, it's file system time. Xiaomi stores not only your photos, but also messenger cache, thumbnails, and deleted items. Simply deleting files through Explorer often leaves them in a basket or hidden folders, from where they are easy to recover.
To create a reliable copy of data, it is better to use the built-in system tools or specialized software on a PC. Local backup MIUI allows you to save even the desktop layout and alarm settings, which will save time when setting up the next smartphone of the same brand.
Recommended procedure for backup:
- 💾 Go to Settings. → The phone. → Backup and restore and create a copy on a PC or external drive.
- 🖼️ In the Gallery app, clean up the album "Recently Deleted" as the files are stored there for 30 days and take up space.
- 📂 Check the folder. DCIM and Pictures for screenshots with personal data, passwords or card numbers.
☑️ Pre-reset check
Don't forget about messengers. WhatsApp and Telegram store your correspondence and media history locally. Before you delete your apps, make sure to back up your chats to the cloud of the service, otherwise your entire communication history will be lost irretrievably after you reset.
Working with banking applications and NFC
Financial security is the number one priority when preparing a gadget for sale. Xiaomi banking applications often have additional layers of protection tied to a particular device and its security certificates. Simply removing the application is not enough – you need to untie the device on the bank side.
Many users are unaware that payment tokens can be stored in a secure memory area; even after a reset, it is theoretically possible to access some data through complex recovery methods unless properly deauthorized; and removing payment card data from Google Pay (or its analogues) and bank applications is a must.
List of actions for financial security:
- 🏦 Go to each banking application, find the Security or Devices section in the settings, and remove the current phone from the trusted list.
- 💳 Untie cards from all contactless payment services and app stores (Google Play, AppGallery).
- 🔒 If you used Face ID or unlock by fingerprint, delete biometric data in the Passwords and Security section.
⚠️ Warning: After selling your phone, be sure to change your online banking passwords as sessions may have remained active on the server.
It is also worth checking auto payments: subscriptions to streaming services or cloud storage associated with this device, it is better to re-tether to a new gadget or PC, so as not to lose access after changing a number or account.
Full reset (Hard Reset) on Xiaomi
When all the data is saved and the accounts are untied, there comes a moment of truth, a complete reset. On Xiaomi devices, this procedure has its own nuances, different from stock Android. The system can offer various cleaning options, and it is important to choose the deepest formatting level.
There are two main ways to reset: through the settings menu and through the Recovery mode. The first is preferred for most users, since it automatically checks for active accounts and blocks the process if you forgot to log out of Mi Account.
Reset algorithm via menu:
- Open the Settings and find the About Phone section.
- Scroll down to the Reset button.
- Select the option to erase all data (Factory Reset).
- The system will request a graphical key or screen unlock password for confirmation.