Xiaomi Redmi 9C NFC is a budget smartphone with extensive customization options, but many users face the need to use Fastboot mode to firmware, unlock the bootloader or restore the system.This mode is a powerful tool that allows you to interact with the device at a low level, but requires caution: wrong actions can turn the phone into a “brick”.
In this article, we will discuss what is Fastboot on Redmi. 9C NFC, Why you need it, how to enter and exit mode correctly, and also consider the main scenarios for its application - from installing custom firmware to solving loading problems. 9C NFC, associated with its hardware platform and bootloader version.
What is Fastboot and why is it needed on Xiaomi Redmi 9C NFC?
Fastboot is a protocol and the same mode of operation of Android devices, which allows you to exchange data between a smartphone and a computer through the Internet. USB-Unlike normal operating mode, Fastboot is activated before the operating system boots, which gives access to low-level commands for the operation of the operating system:
- 🔄 Firmware of official and custom images of the software (including MIUI, LineageOS, Pixel Experience).
- 🔓 Unlocking the bootloader – a mandatory step before installing unofficial firmware.
- 🛠️ System recovery after crashes when the smartphone does not boot (for example, after a failed update).
- 📱 Modified recovery installations (TWRP, OrangeFox for advanced file management.
- 🔍 Diagnostics of hardware problems (memory check, display testing, etc.).
On Redmi 9C NFC (codename angelicanfc), Fastboot mode is particularly important because of the features of its MediaTek Helio G35 chipset. Unlike devices on Qualcomm Snapdragon, where firmware often uses EDL mode, here Fastboot is the main way to manipulate firmware. However, it is worth remembering that incorrect commands can lead to loss of warranty or irreversible data damage.
⚠️ Attention: On Redmi 9C NFC Unlocking the bootloader via Fastboot requires linking the Mi Account to the device. Without this step, custom image firmware is impossible, and trying to circumvent the restriction can lock the phone permanently.
How to Get Fastboot Mode on Redmi 9C NFC: 3 Proven Ways
Login to Fastboot on Redmi 9C NFC is done in several ways, and the choice of method depends on the current state of the device (whether it works, whether it responds to buttons, whether there is access to ADB).
Method 1: Through hardware buttons (if the smartphone is turned off)
- Turn off the Redmi 9C NFC completely (press the power button and select “Switch off”).
- Press and hold the Power + Volume down buttons at the same time.
- Hold them for 8-10 seconds until the Fastboot logo appears on the screen.
Method 2: Through ADB (if the smartphone is on)
If the device is working, but you need to go to Fastboot without physical buttons:
adb reboot bootloaderThis command is entered in Command Prompt (or Terminal on macOS/Linux) after connecting the smartphone to a PC with USB debugging enabled (Settings → About Phone → MIUI version – 7 times press to activate the developer mode, then Settings → Additional → For developers → Debugging over USB).
Method 3: Through the Mi Flash Tool (forced transition)
If the smartphone does not respond to buttons, but is defined by the computer as Qualcomm HS-USB QDLoader 9008 (rare for MediaTek, but possible when crashes), you can use the Mi Flash Tool utility:
- Connect the Redmi 9C NFC switched off to your PC.
- Run the Mi Flash Tool and press Refresh – the device must be determined as COM-port.
- Select from the Advanced → Reboot to Fastboot menu.
Fastboot teams for Redmi 9C NFC: major operations
Once logged in to Fastboot, all manipulations with the Redmi 9C NFC are done via the command line on the PC, below are the basic commands that will come in handy for diagnostics and firmware.
| Team team. | Description | Example of inference |
|---|---|---|
| fastboot devices | Checking the device connection | 1234567890abcdef fastboot |
| fastboot getvar all | Viewing device information (serial number, bootloader version) | (bootloader) version: 0.5 |
| fastboot flashing unlock | Unlocking the bootloader (requires Mi Account binding) | OKAY [ 0.123s] |
| fastboot flash recovery twrp.img | Install custom recovery (e.g. TWRP) | Sending 'recovery' (12345 KB) OKAY |
| fastboot reboot | Rebooting the device to normal mode | Rebooting... |
For the official firmware MIUI Fastboot uses scripting flash_all.bat (from the firmware archive, but on Redmi 9C NFC It is important to consider the version of anti-rollback - protection against rollback on older versions of the software. MIUI, The current one will lead to a breeze (irreversible breakage).
⚠️ Attention: On Redmi 9C NFC with a MediaTek Helio chipset G35 Fastboot Oem unlock and fastboot flashing unlock_critical not working – unlocking is possible only through the official Mi Unlock Tool with an account binding.
Download the official firmware for angelicanfc|Install MediaTek Preloader |Check the anti-rollback version |Connect the smartphone with the original cable |Unlock the antivirus on PC-->
Unlocking the bootloader on Redmi 9C NFC: step-by-step instructions
Unlocking the bootloader on the Redmi 9C NFC is a must before installing custom firmware or recovery. The process is officially supported by Xiaomi, but has a number of limitations:
- Link your Mi Account to your device: Go to Settings → Xiaomi Account and log in. Enable data sync.
Mi Unlock Tool
- Download the utility from the official website.
- Log in to the same Mi Account as on your phone.
- Follow the program instructions (it may take 7-30 days to unlock).
After successful unlocking, the Fastboot screen will be labeled Unlocked. You can now flash custom recovery or firmware, but remember: Xiaomi warranty is canceled, and some features (such as Mi Pay or Widevine L1 for Netflix in HD) may stop working.
What happens if you unlock the bootloader without binding Mi Account?
Redmi 9C NFC Firmware via Fastboot: Official and Custom MIUI
Fastboot firmware on Redmi 9C NFC may be required to:
- 🔄 Recovery after a failure (for example, hanging on the logo) MIUI).
- 🆙 Updates to the new version MIUI without OTA.
- 🛠️ Install custom firmware (for example, Xiaomi.EU or LineageOS).
For official firmware:
- Download the archive with firmware for the Angelicanfc model from MIUI Downloads.
- Unpack the archive and launch it. flash_all.bat (for complete data clean-up; or flash_all_except_data.bat (preservation of user files).
- Wait until the process is completed (the process will take 5-10 minutes).
For custom firmware (e.g. Xiaomi.EU):
- Unlock the bootloader (see the previous section).
- Please. TWRP The command is fastboot flash recovery. twrp-3.7.0_angelicanfc.img
- Reboot to TWRP (Fastboot Reboot Recovery and Installation ZIP-firmware.
⚠️ Attention: On Redmi 9C NFC install firmware with an anti-rollback version below the current one (for example, rollback from the MIUI 13 on MIUI 12) will lead to a hard brick - the device will stop turning on even in Fastboot mode. Check the anti-rollback version in the file anti-rollback.db inside the firmware archive.
💡
Before you run firmware, back up the persist partition with fastboot backup persist.img. This will help restore IMEI and NFC data if they are damaged after installing custom firmware.
Fastboot Errors on Redmi 9C NFC: Causes and Solutions
When you use Fastboot on Redmi 9C NFC, users often encounter errors, and below are the most common problems and ways to fix them.
| Mistake. | Reason. | Decision |
|---|---|---|
| waiting for device | PC does not see the device (no drivers or USB-debugging) | Install MediaTek Preloader drivers, check the cable |
| FAILED (remote: 'Flashing is not allowed in Lock State') | bootloader locked | Unlock with the Mi Unlock Tool |
| Invalid sparse file format at header | Firmware file damaged | Download the archive again, check the checksum (MD5) |
| anti-rollback check fail | Reverse to the old version of MIUI | Sweep through the newer version or restore via the Mi Flash Tool in clean all mode |
If Redmi 9C NFC does not even include Fastboot after a failed firmware, try:
- Connect to charging for 30 minutes (sometimes helps with a discharged battery).
- Press Power + Volume increase for 20 seconds (forced rebut).
- Use the Mi Flash Tool in Download Only mode to re-run the firmware.
💡
If the NFC is missing or the camera is not working after firmware, the most common cause is damage to the persist partition. Restore it from the backup or run through the official MIUI with a full clean (clean all).
How to Get Out of Fastboot on Redmi 9C NFC: 4 Ways
Quitting Fastboot mode usually doesn’t cause problems, but in some cases (for example, after a failed command), the device may “hang” in this state.
- 🔄 Standard Reboot: Enter the command fastboot reboot.
- 🔌 Forced Rebuke: Press the Power button for 15-20 seconds.
- 🔋 Through the recovery menu: Enter fastboot reboot recovery. TWRP or drain recovery select Reboot → System.
Through the Mi Flash Tool:
Refresh
Reboot
If the NFC does not load beyond the MIUI logo after leaving the Fastboot Redmi 9C, this may indicate:
- Damage to the system partition (reflashing is needed).
- Core conflict (try flashing another boot.img).
- Error in the vendor (relevant for firmware based on Android 11+).