Realme /C21/C25 Dead Fix – How to Flash Official Firmware (No Auth Error)
Download Realme /C21/C25 Dead Fix – How to Flash Official Firmware (No Auth Error)
If your device is stuck on the logo or completely black, this Realme /C21/C25 Dead Fix – How to Flash Official Firmware (No Auth Error) is the solution you need. It allows you to revive your bricked smartphone without needing an authorized service center account.
Most MediaTek-based Realme phones require a server login to flash, but this method bypasses those restrictions. Using the correct scatter file and bypass tool, you can rewrite the system partition and fix bootloop issues immediately.
This is a tested, official stock ROM that restores your phone to its factory state. It works perfectly for fixing software bugs, removing screen locks, or recovering from a failed OTA update.
Top Reasons to Use This Official Flash File
- Auth Bypass: Flash the firmware using free tools without needing a paid Oppo/Realme ID.
- Fix Dead Boot: Revive devices that are totally unresponsive or stuck in Preloader mode.
- Clean Software: Remove all malware, viruses, or system errors by performing a fresh installation.
⚠️ DISCLAIMER
Flashing a MediaTek chipset carries risks. Ensure you have backed up any data if possible and follow the steps exactly to avoid permanent hardware damage. Proceed at your own risk.
📊 File Information
| File Name | Realme_C21_C25_Official_Firmware_No_Auth.zip |
| Device Name | Realme C21 (RMX3201) / C25 (RMX3191) |
| Chipset | MediaTek Helio G35 / G70 |
| Android Ver | Android 11 / 12 |
Minimum Requirements
✅ Supported Tools & Requirements
| Host PC: | Windows 7 / 8 / 10 / 11 (32-bit & 64-bit) |
| USB Cable: | Original or High-Quality Data Cable |
| USB Driver: | MediaTek VCOM and Preloader Drivers |
| Battery Level: | At least 50% charge recommended |
🛠️ Best Flashing Tools for this Device
Since these devices run on MediaTek hardware, you need specific tools that can handle the secure boot handshake:
- SP Flash Tool: The industry standard for flashing scatter-based firmware on MTK devices.
- MCT Auth Bypass Tool: Essential for skipping the secure No Auth Error during the connection phase.
- UnlockTool: A premium alternative that handles the flash and bypass automatically in one click.
⚡ How to Flash
- Download and extract the Realme official firmware and the MTK flash tool to your PC.
- Install the MTK USB Drivers and the LibUSB filter driver to ensure the PC detects the phone.
- Open the MTK Auth Bypass Tool and click on “Disable Auth” to prepare the connection.
- Launch SP Flash Tool, load the Scatter file from the firmware folder, and untick the Preloader (optional but safer).
- Power off your phone, hold Volume Up + Volume Down, and connect it to the PC via USB cable.
- Once the bypass tool detects the device, click Download in SP Flash Tool and wait for the Green Tick.
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