Owning a modern Xiaomi smartphone implies a periodic need for deep cleaning of the system. The Redmi 9 NFC model, with its excellent autonomy and functionality, can accumulate software errors over time that negatively affect the speed of work. Situations when the device begins to work unstable can be caused by a variety of factors, from overcrowded memory to conflicts of recently installed applications.
Fully returning to the original state, or so-called Hard Reset, is the most radical and effective way to solve such problems, which completely removes all user data, settings and applications, returning the software to the state in which it was in immediately after purchase. It is important to understand that this process is irreversible without a pre-created backup, so it should be approached consciously.
In this article, we will discuss in detail all available ways to perform a reset for the Redmi 9 NFC model. You will learn how to safely prepare the gadget for the procedure, what are the hidden nuances of working with the MIUI shell and how to act if the device is locked or does not respond to touching the screen.
Preparing the device for a complete data reset
Before you initiate the cleanup process, you need to perform a number of preparatory steps that will protect your personal data and ensure the stability of the procedure. The first and most critical step is to back up all important information. You can use Google cloud services or the built-in Mi Cloud application to save contacts, photos and installed list of programs.
Pay special attention to the Google account associated with the device. Once reset, the security system will require confirmation of the owner by requesting a login and password from an account that was active before the cleanup. If you forget the data from the Google account after the reset, unlocking the phone without losing warranty will be extremely difficult due to the FRP protection system.
It is also worth checking the battery level. Although the reset process does not take long, interrupting the power supply at a critical moment can damage the system files. It is recommended to have a charge of at least 50-60%. If you use a microSD card, it is better to remove it before starting the operation, so that the files stored on it are not accidentally erased.
Make sure you know the pattern lock, PIN-The code or password that was used to lock the screen. MIUI The system may request confirmation of current security data before starting the formatting procedure.
The easiest and most secure way to return to factory settings is available directly from a working operating system, which is suitable for most users whose phones are functioning normally but require cleaning. First, go to the main menu and select Settings.
In the settings list that opens, you'll need to find the About Phone section, which is usually at the bottom of the list. Inside this section, scroll down until the Reset option appears. The system will offer you several options, among which you'll need to choose to Erase all data.
Why do you need to enter a password?
The system requests a screen lock password to confirm that the action is being performed by the owner of the device, not by an unauthorized person who has access to the unlocked phone.> After selecting the appropriate item, a warning will appear on the screen that all data will be destroyed. You will need to enter the screen unlock password. Then the system can request a password from the MI or Google account for final confirmation. By pressing the confirmation button, you will start the process, after which the device will restart and begin cleaning. The time it takes to complete the operation depends on the amount of accumulated data and the internal memory speed. The screen can go out and light up several times in the normal partitioning process. Method 2: Hard Reset via Recovery Mode If the smartphone freezes, does not respond to touches or does not load to the desktop, the only way out is to use Recovery Recovery Mode. This method allows you to reset at the bootloader level, bypassing the operating system interface. To enter this mode, you need to turn off the device completely. After turning off, press the volume button and the power button simultaneously. Hold them until the Redmi or Mi logo appears, then release the power button, but continue to hold the volume button until the Main Menu menu appears. ⚠️ Attention: In the Recovery menu, the touch screen does not work. All actions are performed only with mechanical buttons on the body of the smartphone, so as not to confuse the choice of item. Using the volume buttons, go down to Wipe Data and confirm the choice with the power button. In the next menu, select the Wipe All Data option. The system will again warn about the consequences and require confirmation through Confirm. After successful cleaning, select Back to Main Menu and then Reboot -> Reboot to System: The first download after such a reset can last longer than usual, sometimes up to 5-10 Don't panic or try to reboot the device at this point, let the system fully initialize the files. Delete the forgotten password and pattern lock Often users are looking for a way to reset precisely to unlock the device if they forgot the password. 9 NFC Hard Reset through Recovery (described above) does allow you to delete a forgotten pattern lock or digital code. Once reset and turned on again, the phone will require you to enter data from a Google account that was synced to the device previously (FRP — Factory Reset Protection. Without the owner's login and mail, you can't use the phone. There's a myth that Recovery resets completely bypasses the protection. FRP It's tied to the hardware identifier of the device on Google servers, and if you've forgotten both the screen password and the Google account password, it's almost impossible to restore access through official means without going to the service center with a check to buy. 💡If you plan to sell the phone, reset through Settings by pre-unlocking your Google account.This ensures that the new owner does not face lockdown. FRP. In some cases, if the phone was linked to a Mi Account and the Find Device feature is enabled, you will also need to enter a password from your Xiaomi account. Make sure you remember this information before selling or transferring the gadget to another person. Solving problems after reset Even after a properly performed procedure, there may be some difficulties. One of the frequent problems is a “bottle” when the phone is endlessly rebooted on the logo. This may indicate damage to system files or an unsuccessful update. In this case, you may need to flash the device through the computer using the Mi Flash Tool utility. Another common situation is a quick re-discharge of the battery. Usually 30-60 During active use, the temperature normalizes and autonomy is restored.Problem Possible cause Solution Endless reboot System File Error Flashing through PC Calibration failure Menu or service requires an old account Protection FRP Data entry Google/Mi No network./IMEI Damage to section EFS Backup recovery NVRAM If the module has stopped working after the reset NFC or proximity sensor, try to perform calibration through the engineering menu, typing in the Phone application code ##6484##. This will allow you to test hardware components and exclude software failure drivers. 💡Constant heating and discharge in the first hours after reset is a normal process of optimizing the Android system, which takes place on its own. The impact of the reset on Redmi 9 performance NFC Many users expect that after Hard Reset, the phone will start to work like a new one, and in the case of the Redmi 9 model, the phone will start to work like a new one. NFC Clearing the cache, removing residual files from remote applications, and resetting system settings do free up CPU and RAM resources, but it's worth considering that hardware aging is not going away. If the flash memory of the device has physical wear, a dramatic increase in speed will not occur. reset helps eliminate software "garbage", but can not increase the clock speed of the processor or expand the physical volume. RAM. However, for devices that are in use for more than a year without reinstalling the system, resetting is a great way to extend the life of a gadget. It eliminates update conflicts and database bloat, which is especially important for the shell. MIUI, When you go back to factory settings, it's recommended that you don't install all the applications at once, but do this gradually, by tracking the behavior of the system, and this will help you identify the "culprit" of problems if they were caused by a particular software. Frequently asked questions (FAQ) Will resetting a photo on a memory card? If you have selected the option "Erase all data" through the settings menu, the system usually asks if you need to format internal memory. SD-The card is usually unaffected unless you have chosen the option to format external memory specifically. However, when resetting through Recovery, all available partitions are sometimes cleared, so the memory card is better removed in advance? The formatting process itself takes 2 to 10 minutes depending on the amount of data. However, the first download after the reset can last up to 15 minutes. Do not interrupt the process, even if the screen is burning with the logo for a long time. Can I interrupt the reset if I change my mind? If the process has already begun (a progress bar or an Android logo with gears appears), it is absolutely impossible to interrupt it, it will damage the file system and the phone cannot be booted. You can only interrupt at the confirmation stage in the menu. SIM-- Take out the map before reset? SIM-This is a card that is not necessary, but it is desirable, and it ensures that you do not lose contacts if they are saved on the site. SIM-Google account, not a map, although modern systems usually warn you about this.