How to Clean Xiaomi Before Selling: From Deleting Data to Resetting MIUI

Why Cleaning Files Will Not Save Your Data

Selling a Xiaomi smartphone is not only a way to make money from a new gadget, but also a potential threat to your privacy. Even if you delete all photos, messages and applications, residual data can be recovered using special software. For example, files deleted through the basket remain in the device’s memory until they are overwritten with new data. And the cache of applications (such as Telegram or WhatsApp) often stores fragments of correspondence, geolocation and even media files.

In 2023, Kaspersky researchers conducted a study that found that 70 percent of used smartphones purchased through Avito and Yula were able to recover personal data from their previous owners, including social media logins, bank notifications and even screenshots of documents, and that users were limited to surface cleaning, unaware of deep data resetting and encryption.

This article is not just a manual, but a step-by-step algorithm that takes into account the features of MIUI, which ensures that after sale, your Xiaomi will become a “clean slate” for the new owner, we will analyze not only the standard reset, but also hidden settings that the manufacturer does not advertise.

Step 1: Backup – What to Save Before Cleaning

Before you erase your data, make sure that important information is transferred to a safe place. Xiaomi offers built-in redundancy tools, but they are not perfect. For example, Mi Cloud does not save passwords from Wi-Fi, settings of some applications and data from games.

• 📱 Contacts and calls: Export through Contacts → Settings → Import/export to.vcf (supported by Google Contacts and iCloud).
• 📸 Photos and Videos: Use Google Photos or transfer files to your PC via Google Photos MTP-protocol (includes in the notification curtain when connecting to the USB).
• 🔑 Passwords and Tokens: If you use Mi Account to autocomplete, export your data through Settings → Passwords and security → Auto-filling.
• 🎮 Save Games: For cloud-saving games (such as Genshin Impact), link your account to your mail. Local saves (like Minecraft) manually copy from your folder /Android/data.

Important! Don’t rely on Mi Cloud alone: the service limits free storage to 5GB and may not sync files older than 30 days. Use a cloud + local storage combination (such as an external SSD) for reliability.

Step 2: Deleting accounts – why it’s critical for MIUI

One of the most common shackles in Xiaomi sales is forgotten linked accounts, which even after a reset can remain locked through Mi Account (especially on models with MIUI 12+), which leads to the fact that the new owner will not be able to activate the phone without your login and password.

To avoid problems:

1. Go to Settings → Accounts and Sync → Mi Account and click “Exit”.
2. Delete all other accounts (Google, Facebook, VK) through the same section.
3. For models with MIUI 14 and later, check the status of the device in the Mi Cloud at i.mi.com. If the phone is still tied, do the uncoupling manually.

Warning for owners of Redmi Note 10/11 and POCO F3/F4: these models may remain linked to Google Account (FRP-blocking) after reset. To remove it, before reset, disable Settings → Google → Device Deletion.

Step 3: Cleaning Storage – What to Delete Manually

Resetting to factory settings does not clear some system folders and app cache. Here's what you need to manually delete before resetting:

For deep cleaning, use Files by Google (available in the Play Market), which finds residual files, duplicates and debris that the standard MIUI file manager does not see.

• 🗑️ Temporary.tmp and.log files.
• 📂 Empty folders from remote applications.
• 🔍 WebView cache (used to display web pages in applications).

Delete Mi Account| Clear the cache of all applications |Delete Downloads |Delete Google |Delete Google Sync |Chronization Check device uncoupling in Mi Cloud-->

Step 4: Complete resetting of settings - how to do it right

Now, the most important thing is hard reset, and MIUI has two ways of resetting: through the settings menu and through the Recovery Mode, which is more reliable because it erases data at a low level, including partitions.

Method 1: Reset via settings (for beginners)

1. Open Settings → About the phone → Reset settings.
2. Select “Erase all data” and confirm the action.
3. Enter. PIN-code or pattern lock if the system requests.
4. Wait for the reboot (it will take 5-10 minutes).

Method 2: Recovery Reset (recommended)

1. Turn off the phone.
2. Press the Power button + Volume up until the Mi logo appears.
3. In the Recovery menu, select Wipe Data → Wipe All Data (manage by volume buttons, confirm by power button).
4. After reset, select Reboot → Reboot to System.

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If the phone hangs on the Xiaomi logo after the reset, it means that the system partition was damaged, in which case you need to flash the device through the Fastboot using the Mi Flash Tool.

Attention! On Xiaomi 12/13 and Redmi K50 models, a Recovery reset can block the bootloader if you previously unlocked it, in which case the phone will require authorization to the Mi Unlock Tool after the reset.

Step 5: Checking After Reset – How to Make Sure Data Is Deleted

Don't trust the system at its word. After the reset, follow these steps to confirm the cleanliness of the device:

1. Check the storage: Open the file manager and make sure the DCIM, Downloads, and Pictures folders are empty.
2. Start setting as a new user: Go through the initial setup without connecting accounts. Check if there are any old photos in the gallery or SMS messages.
3. Use a data scanner: Install the DiskDigger app (requires root) and scan the memory for residual files. If you find something extra, reset again.

For models with MIUI 14 and later, there is a hidden check function: type ##4636## in the dialer, then go to Storage. If the Internal Storage displays "0% used", then the data is erased correctly.

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Even after a reset, some data can be recovered with professional software (e.g. Oxygen Forensic Detective).If you sell a phone with sensitive information (e.g. a corporate phone), consider physically destroying the memory (e.g., soldering the chip).

Step 6: Preparing for Sale – How to Increase Your Phone Value

A clean phone is not only about security, it's about selling it better, and here's what you can do to make it more attractive:

• 🔋 Check the battery: Use the AccuBattery app to find out the actual capacity. >30%, honestly state this in the ad (or replace the battery).
• 📱 Update the firmware: Install the latest version MIUI through settings → Update: Customers are more likely to choose phones with up-to-date software.
• 🛠️ Clean connectors: Use wooden toothpick and alcohol to clean USB-C, The dust in the connector is a common cause of customer complaints.
• 📦 Get the kit: Find the original box, cable and adapter. The full kit increases the cost by 10-15%.

Secret Life Hack: If the screen has minor scratches, treat it with glass polyrene (like Displex) that will temporarily mask the defects and make the phone look like new.

When composing an ad, avoid template phrases like “excellent condition” instead, state specific pros:

✅ Battery 92% (accuBattery) with no swelling. ✅ Screen without broken pixels (tested by #3644633##). ✅ Unlocked for all operators (verified) SIM-MTS and Tele2 maps).

Frequent Mistakes and How to Avoid Them

Even experienced users sometimes miss important points.-5 Mistakes in preparing Xiaomi for sale:

1. Find Device: If you leave Settings → Mi Account → Find Device enabled, the new owner will not be able to use the phone without your permission.
2. Stay. SIM-Cards: Check the trays for SIM — Sometimes there are old cards or adapters of nano-SIM.
3. Camera settings: In Camera Settings → You may also save your preferences (e.g. shutter sound switched off). Reset them manually.
4. Forgot cloud backups: Remove phone backups in Mi Cloud and Google Drive so the new owner can’t recover them.
5. Untested Sensors: Before selling, test the gyroscope, compass and proximity sensor through the engineering menu (#4636###).

Warning: If you sell a phone with a bootloader unlocked, be sure to alert the customer. Some models (such as the Xiaomi 11T) may require re-unlocking after reset, which takes up to 72 hours.

FAQ: Answers to Frequent Questions