How to Reset Xiaomi Redmi 9C to Factory Settings: The Complete Guide

Why you need a reset to factory settings and when to apply it

Resetting the Xiaomi Redmi 9C to factory settings is a radical but effective way to restore the smartphone to its original health, which removes all user data, apps and settings, returning the device to a “out of the box” state, most often in three cases:

First, if the smartphone starts to slow down or reboot spontaneously. Over time, the system gets clogged with cache, residual files of deleted applications and fragmented data. Even regular garbage cleaning doesn't always help, where reset becomes the only way to "reset" the software part. Second, the procedure is mandatory before transferring or selling the device. Without a full reset, the new owner can access your accounts, photos or messages. Finally, a reset is required after unsuccessful experiments with firmware, rooting or installing custom mods when the phone stops loading.

It is important to understand that Redmi 9C Based on the MediaTek Helio processor G35 and MIUI For example, after reset via Recovery, you may need to re-assign your Mi Account if you previously activated the "Device Protection" function. MIUI 12.5+ The algorithm of data encryption has changed – it affects the speed of the procedure.

Before you start, answer two questions: whether important data (photos, contacts, messages) are saved and whether you remember the username / password from Mi Account, if it was tied, without which you risk losing access to the phone after a reset.

Preparation for resetting: what to do in advance

An unprepared reset can result in a loss of valuable data or a lock on your phone, and here is a checklist of the required actions before the procedure:

Backup via Mi Cloud or locally

Write down the username/password from Mi Account (if linked)

Check the battery charge (minimum 50%)

Delete. SIM-card and memory card (optional)

Download the latest version of MIUI for your model (in case of problems)

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Start with backup. In Redmi 9C, you can do this in two ways:

• 📱 Local Copy: Go to Settings → The phone. → Backup: The system will offer to save data to internal memory or microSD card. minus the method - the copy takes up a lot of space (from 2 to 8 GB) and is not protected from physical damage to the phone.
• ☁️ Mi Cloud: In the same settings, select Backup to Mi Cloud. Make sure you have enough space (free 5GB). SMS-code, so don't delete it. SIM-mapping.

Pay special attention to your Mi Account. If you forget your password, restore it in advance at account.xiaomi.com. Once reset via Recovery, your phone may require you to enter your account information to unlock it, which is protection against theft. On models with MIUI 13+, two-factor authentication is added, so link backup email to your account.

⚠️ Note: If you are buying a Redmi 9C Hands on and the previous owner didn't untie his Mi Account, a reset via Recovery will lock the phone, in which case you will need an official unlock through the Xiaomi service center (cost from 1500). ₽).

Method 1: Reset via the settings menu (the safest)

This method is suitable if the phone is turned on and you remember the pattern lock or PIN-The main advantage is that there is minimal risk of error, because the process is controlled by the system. MIUI 12.0.8 and later (on Redmi) 9C box-mount MIUI 12.0.3).

Step-by-step:

1. Open Settings (the gear icon on the main screen).
2. Scroll down and select About Phone.
3. Slip on Backup and Reset → Reset settings.
4. The system will tell you what to drop: 🔄 Settings and application data 📱 Media files (photos, videos, music) 📞 Call logs and communications

Delete all data

The phone will restart and start the reset process (it will take 3-7 minutes).

Once you reboot, you'll see the screen of the initial setup, like after you buy it, where you can either restore data from the backup or set your phone as new. Note: if you've used device encryption (included in Settings → Security), the first run after the reset will take up to 15 minutes — that's fine.

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If you reset your phone and ask for a Mi Account password, but you don't remember it, try retrieving it via your computer. On account.xiaomi.com, select "Forgot your password?" and follow the instructions. In some cases, linking a new phone number to your account helps.

Method 2: Reset via Recovery Mode (if the phone is not turned on)

If the Redmi 9C is stuck on the logo, reboots cyclically or does not respond to touch, resetting through Recovery Mode will help, which is more risky, since interruption of the process can lead to a "brick" (complete failure) of the device, but it works even when the screen is locked.

To enter Recovery:

1. Turn off the phone (press the power button for 10 seconds).
2. Press and hold the Power button + Volume up until the Mi logo appears.
3. Release the buttons and you will see the Recovery menu in English.

Instructions:

1. Go to i.mi.com and log in.
2. Select your Redmi 9C from the menu (if multiple devices are tied).
3. Press Find the device. → Erase the data.
4. Confirm the action. SMS-code sent to the linked number.
5. Wait for a notification of a successful reset (can take up to 30 minutes).

This is a convenient way to do it if the phone is lost or stolen -- you're not only going to drop the data, you're going to lock the device down to the outsider.

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Remote reset via Mi Account is the only official way to unlock your phone if you forget your pattern lock, but remember your Xiaomi account details.

What to do if the reset did not help: diagnosis of problems

In 10 to 15 percent of cases, even after a complete reset, problems with the Redmi 9C persist, which may indicate hardware malfunctions or deep software failures.

1.The phone is cyclically rebooted after resetting

• 🔋 Check the battery: if it is swelling or does not hold the charge, replace it (cost for Redmi) 9C — 800 ₽).
• 🔄 Fastboot your phone with the Mi Flash Tool. Download the official firmware for your model at en.miui.com.
• 🛠️ If nothing works, the problem may be in the eMMC memory. The service center will check it with ChipGenius or Flash. ID.

2.After reset, there is no network or is not working SIM-map

• 📶 Restart your phone and check if the mobile network is active in the settings.
• 🔧 Enter the code ##4636### and select Phone Information. IMEI (If it is not available, it will be necessary to restore SN Writer Tool).
• 🔄 Reset network settings: Settings → SIM-maps and mobile networks → Resetting network settings.

3. the phone does not turn on after reset (black screen)

• 🔌 Connect the charger for 30 minutes – the battery may have completely drained during the procedure.
• 🔧 Try to log into Fastboot Mode (clip the power supply) + Volume down. If the phone is detected by a computer, it can be reflashed.
• 🛠️ If the screen is black even when connected to a PC, the fault may be in the display plume or motherboard. ₽.

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If the phone is constantly warming after reset, check the CPU boot in the Settings → Battery menu. If the boot is above 30% in idle, the MediaTek Helio G35 chip is likely to malfunction (motherboard replacement is required).

How to recover data after resetting

If you backed up before reset, you can restore the data right at the initial setup stage.

• ☁️ Mi Cloud: Restores contacts, messages, photos and some app settings. APK-file.
• 📱 Local Copy: Select a backup file from your phone’s memory or microSD card. Recover almost all data except for some system settings.
• 🤖 Google Account: Restore contacts, calendar, and some app data (e.g. Chrome bookmarks).

If there is no backup, try the following tools:

For Redmi. 9C Without root rights, the best option is Dr.Fone (license price) ~2000 ₽). It scans internal memory and recovers deleted files even if the phone is not rooted. But remember, the more data you write to your phone after a reset, the lower your chances of recovery.

⚠️ Warning: Don't install recovery software directly on the phone you want to recover files from! This will overwrite memory sectors and reduce your chances of success. Use your computer and connect Redmi 9C mode MTP.

FAQ: Frequent questions about Redmi 9C reset