Selling a smartphone is a process that requires not only finding a buyer, but also carefully preparing the device. If you own a device from Xiaomi, Redmi or POCO, it is critically important to properly complete the possession of the gadget. Simply removing contacts or photos is not enough to completely clean, since modern security systems deeply integrate user data into the hardware.
Failure to do so can result in the new owner simply not being able to activate the device. Activation Lock is a powerful security mechanism that turns the phone into a useless brick if it has a login account, and in this article, we will take a detailed look at each step required to securely transfer rights to the device.
We will consider not only the standard reset, but also the specific nuances of the shell. MIUI And the new HyperOS. You'll learn how to check the binding status. SIM-Ignoring any of these steps can come as a nasty surprise to both the seller and the buyer.
Why it is critical to unplug your Mi Cloud account
Xiaomi's ecosystem is built around a single Mi Account identifier, which is the key to all of the company's services, including device search, cloud storage and data synchronization. As long as the phone is tied to your ID, it is considered your property at the manufacturer's server level. Even after fully resetting to factory settings, the device will request the password from the account that was previously installed on it when it is first activated.
If you forget your password or lose access to your email, it will be extremely difficult to restore your device, and in some cases impossible, without contacting official support with purchase checks. Find the device remotely locks your phone, and only the account holder can remove this lock, which is why undocking is not just a recommendation, but a mandatory requirement before selling.
⚠️ Note: If you sell your phone without untidying your Mi Account, the buyer will not be able to log in.You will have to be in touch to enter your password, which inconveniences both parties and jeopardizes the security of your data.
In addition, your backup photos, notes and voice recordings can remain in the cloud, and by untying your account, you break the link between hardware and your personal data in the cloud, ensuring that even with the new owner’s sophisticated data recovery techniques, your personal information remains unavailable.
Data preparation and verification of tied devices
Before we start a radical cleanup, we need to audit what's stored in the phone, and backup is the first and most important step, and make sure that all important contacts, messaging and media are stored on an external medium or other cloud service that is not associated with the device being sold.
☑️ Checklist before reset
If you used two-factor authentication, the phone can be listed as a trusted device to log into other services (banks, mail, social networks), removing the device from the list of trusted services in the security settings of the services themselves will prevent potential access problems in the future.
Pay particular attention to applications that have access to payment data. Google Pay (or its analogues) and banking applications often retain access tokens. Although a reset deletes that data, it is better to manually log out of all financial applications before cleaning.
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Before selling, take screenshots of important settings or serial numbers if you plan to buy a new phone of the same brand – this will speed up the process of initial setup of the new gadget.
The procedure for leaving the Google account and Mi Account
The best way to do this is to log out of all accounts manually before you do a general reset, starting with a Google account, which is the baseline of the Android operating system, and then go to the settings, look for Accounts and Sync, or Users and Accounts.
In the list, select your Google account and click on Delete Account or Sign Out. The system will warn that all data associated with that account on the device will be deleted. This is normal and necessary. After that, repeat the procedure for the Mi Account. In Xiaomi devices, this account often takes priority, and its deletion requires a password confirmation.
- 📱 Open Settings and go to the Mi Accounts section.
- 🔓 Click on the exit or delete account button.
- 🔑 Enter the password from Mi Account to confirm identity.
- 🗑️ Confirm the deletion by agreeing to the cleanup of local synchronization data.
It’s important to understand the difference between simply logging out and removing your device from the cloud. In some versions of the firmware, after logging out of your Mi Account, you need to go to i.mi.com from your computer to make sure that the device is no longer displayed in your gadget list, which ensures that the server “released” the phone.
⚠️ Warning: If you try to log out of your Mi Account, your phone requires an unlock code you forgot, or a two-factor authorization code you lost, you can't sell.
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Full logging out of Google and Mi accounts before resetting is the only way to ensure that the new owner avoids FRP.
Full reset (Hard Reset) through the menu
Once you've logged out, you can start completely clearing your memory, and the standard method is to use a built-in factory reset menu, which is the safest way for the user, because the system will shut down all the processes correctly and rewrite the memory partitions.
Go to the Settings menu, then select About Phone (or “Advanced Settings” in older versions). MIUI). Find Reset or Erase all the data, and the system will offer a few options, but we need a full reset, and be prepared for the phone to request a pattern lock, PIN-code or fingerprint to confirm the operation.
| Parameter | Description of action | The result |
|---|---|---|
| Resetting settings | Return of system settings to the original | Save files, reset settings |
| Clearing all data | Complete removal of user information | Phone as new, data deleted |
| Formatting | Deep Cleaning of Internal Memory | Inability to recover data |
During cleaning, the phone can restart several times. The Android or Mi logo can be displayed on the screen, as well as the progress bar. Under no circumstances interrupt this process, do not remove the battery (if it is not removable) and do not press buttons. Interrupting the recording of system files can damage the bootloader.
What do I do if the reset is frozen?
Cleaning with Recovery Mode: An Alternative Method
If you can't access the settings menu because of system errors or a forgotten unlock password (but if you remember the passwords from the accounts), you can use Recovery Mode, which is a more "rough" but effective method. To log in, you need to turn off the phone and pinch the button combination: usually it's Volume Up + Power.
In the Recovery menu, you can navigate with volume buttons, and you can choose with a power button (on older models) or a touch screen (on new ones). Select a language (English), then a Wipe Data option. Here, you need to choose Wipe All Data to clear not only the cache, but also the user partitions.
This method is especially useful if the touch screen is partially broken and you can’t go through the settings. However, after such a reset, the Android security system can request proof of ownership when you first boot. If you haven’t logged out of your Google account, FRP (Factory Reset Protection) protection will work.
Verification SIM-maps and additional services
Many users forget that modern SIM-These cards also have memory and can store contacts. SIM-A card for the presence of saved numbers before selling is necessary.In addition, Xiaomi smartphones have a security feature SIM-map PIN-code that is better to disable or communicate the code to the buyer.
Also worth paying attention to is linking to services like Xiaomi Wear (for watches and bracelets) or smart home. If the phone was a smart home control center, remove it from the device list in the Mi Home app on another of your devices, which will break automatic scripts that might try to send a command to a sold phone.
Don't forget to remove the tray for SIM-The tray in Xiaomi phones is often combined, and an inexperienced user can accidentally damage the mechanism by trying to insert the card where it should not be, or lose your flash drive. Visually check the slot before packing the phone.