The Xiaomi Mi 9 SE, codenamed M1903C3GG, is a popular device, but over time, any gadget can experience software failures. Users often notice a slowdown in the interface, strange errors in applications, or simply want to transfer the device to a new owner. In such situations, the most effective solution is to return to the original state of the system. This procedure completely cleans the internal memory, removing all user data, application logs and accumulated system debris.
Complete reset, or Hard Reset, requires careful preparation, because the process is irreversible. All your photos, contacts, messaging and installed programs will be irretrievably lost. That is why it is critical to back up all important information in advance on the Mi Cloud cloud service or on an external computer. Ignoring this stage can lead to the loss of valuable data, which will later be impossible to recover by standard means.
In this guide, we will discuss in detail two main ways to perform a reset: through the standard Android settings menu and through the special Recovery Mode engineering menu. The first option is suitable for regular situations when the phone turns on and responds to touch. The second method is necessary in cases where the system is locked, the screen does not respond or the device goes into an endless reboot. The choice of the specific method depends on the current technical condition of your M1903C3GG.
Preparation of the device for the discharge procedure
Before you start any manipulation of system files, you need to make sure that the smartphone battery is charged at least 50-60%. The process of erasing data and reinstalling system files is energy intensive, and suddenly turning off the device in the middle of the procedure can damage the system partition. If the phone runs out at this point, there is a risk of turning the device into a “brick”, the restoration of which will require complex reflashing through the computer.
⚠️ Warning: Make sure you know the password from your Google account. FRP (Factory Reset Protection will request the account information that was previously synced to the phone, without which it will be impossible to activate the device. You also need to turn off the lock screen if you plan to reset via the menu, although with full formatting, this requirement may vary depending on the version. MIUI. Check for important files in the download folder and internal memory. SIM-MicroSD card or memory card, it is better to remove them before the procedure, so as not to accidentally format external media if you choose the wrong menu item. 💡Take a screen photo with your current network settings and important passwords if you’re not using sync to restore services faster after a reset. The safest and easiest way to return the Xiaomi M1903C3GG to factory status is to use the built-in operating system functionality. This method is recommended for all users whose smartphones are stable, open applications and respond to commands. The process is fully automated and minimizes the risk of human error when navigating the technical menu. First, open the Settings app and scroll through the list at the bottom. You are interested in the About Phone section. Inside this menu, you need to find the item "Resetting." Depending on the version of the MIUI shell, this item can be located in the sub-menu or be highlighted by a separate line when you will delete the data, and you will see the following: "Save all the data" (Setite all the data). To return to factory status, you choose the second option, and then you need to enter the unlock password or the pattern lock, and the device will again request confirmation and possibly a password from the Mi Account to verify the identity of the owner. 📱 Open “Settings” and go to the “About Phone” section». 🗑️ Select “Reset Settings” and click “Erase all data». 🔐 Enter the unlock password and confirm the operation in the window that appears. ⏳ Wait for the automatic reboot to start the cleaning process. Once confirmed, the phone will restart and the Xiaomi logo will appear on the screen with a progress indicator. This stage can take anywhere from 5 to 15 minutes. Don't try to interrupt the process or turn off the device. After cleaning, the smartphone will turn on as new, offering to choose a language and connect to the Wi-Fi network. ☑️ Checklist before reset Made backup of contacts Extracted SIM-Card Battery charge higher 50%Known password from Google account Completed: 0 / 4 Reset via Recovery (Hard Reset) mode if your smartphone M1903C3GG It doesn't turn on, it doesn't freeze on the logo or it doesn't react to the touch of the screen, it requires Recovery Recovery, which is a deeper method that allows you to reset even when the Android interface is not working. Enter this mode is a combination of physical buttons before the operating system boots. First, turn off your smartphone completely. If the device is getting stuck and does not respond to a normal shutdown, press the power button on the device. 10-15 As soon as the phone is off, press the power button and the volume up at the same time». Hold them until the Mi logo appears, after which the power button can be released, continuing to hold the volume key. ⚠️ Attention: In Recovery mode, the touch screen is not working. Navigate the menu with volume buttons (up/down), and the choice of item is confirmed by the power button. You will be taken to the Main Menu main menu. With volume buttons, select Wipe Data and confirm the choice with the power button. Then select Wipe All Data. The system will warn you of the consequences again — choose Confirm. After completing the cleaning process, which will take a few seconds, select Back to Main Menu, then Reboot and Reboot to System. Control button Result Moving on the menu Volume Up / Down Selecting the desired item Power Confirmation Going to the submenu or start the action Back Back Back Back Back Back Back Up Up Up Up Reboot to System Running the cleaned system This method is guaranteed to delete all user data and cache, which often helps to solve problems with software errors that cannot be fixed in the usual way. After rebooting, the device will be ready for the initial setting. What if the Recovery menu does not open? If you press the logo Reboot to the clean system, then you simply turn on the computer after you use it, then you simply try to use it. Deleting Google Account and Protecting FRP Android security system, starting with version 5.1, is equipped with a function FRP (Factory Reset Protection aims to protect the owner’s data in the event of theft or loss of the device. M1903C3GG, But don't delete your Google account first, and when you activate it, you'll need to enter your login and password from your last synchronized account. To avoid blocking, you'll need to manually delete your account before resetting through the settings menu. → Accounts and syncs (or simply “Accounts”). Select your Google account from the list and click “Delete Account” button. Repeat the procedure for your Mi Account if you use it. If the reset is already done through Recovery, and the phone requires a password that you forgot, the unlock procedure becomes more complicated. The only way to officially restore access is through a Google account restoration form on another device. FRP may be unsafe and violate the terms of use of the service. 💡Deleting your Google account before reset is the only guaranteed way to avoid blocking activation FRP. Possible problems and their solution in the process of resetting the model settings M1903C3GG And one of the common problems is that you're stuck on the Mi logo after you've finished cleaning it. 20 For a minute, try to perform a forced reboot by pressing the power button on 15-20 Another common situation is a cyclic bootloop, where the phone is constantly switched off and on, which may indicate damage to system files or conflict updates. In this case, you may need to flash the device through the computer using the Mi Flash Tool utility and official firmware. 🔄 Cyclical reboot is often solved by a complete flashing through the PC. 🔋 If the phone doesn't turn on after reset, leave it on charging on 1-2 hour. 💻 For complex cases, use the Mi Flash Tool computer software. 🛠️ If you have an update error, try resetting via Recovery again. If the sensor or cameras are not working after the reset, check if the system update has been interrupted. Sometimes you need to re-install security updates through the About Phone menu. In rare cases, iron problems can occur after software cleaning, when the load on the controllers changes. 📊 Have you encountered a blockage? FRP Yes, forgot the password No, deleted the account in advance Do not know what it is Use iPhone Initial setting after reset After successful completion of the Xiaomi Mi 9 procedure SE You'll be greeted by a welcome screen. You'll pick the language you want and connect to your Wi-Fi network. You'll be able to recover data from your backup. If you've used Mi Cloud or Google Drive, you'll be able to quickly return contacts, notes and a list of installed apps. An important step is to set up security, register your fingerprint or set up facial recognition, which is not only convenient, but also necessary for payment services and personal data protection. It is also recommended to check for system updates in the About Phone menu immediately, as after the reset, the software version may not be up to date. M1903C3GG clean and ready to go. Performance needs to recover and errors disappear. Clean your memory regularly and don't install applications from questionable sources to keep the system stable for the long term. Can you interrupt a reset if it lasts too long? It's very undesirable to interrupt the process, unless the progress indicator changes no longer. 30-40 In this case, try to press the power button on the 20 If the phone starts resetting again or freezes, you'll need to flash it through the computer. SD? When resetting via the Wipe Data menu, the system usually asks if internal memory needs to be formatted or if it needs to be affected. SD-Be careful when choosing options. When resetting via Recovery (Wipe All Data), most often only the internal partition is formatted, but for reliability, the card is better to extract. What if the phone asks for a password from a Mi Account that I don't remember? Without a password from the Mi Account, it is impossible to unlock the device after the reset because of the protection against theft. You need to restore access to the account through i.mi.com using a linked phone number or email. If access is not restored, you will need to contact an authorized service center with a check for purchase.