Requirements to flash Realme C3i Stock Firmware
By flashing stock firmware on your Realme C3i, you can bring your device to its factory state, fix software issues, and update or downgrade the phone. But need to perform them carefully to avoid risks like data loss or outright bricking devices.

What You Must Do Before Flashing Realme C3i Firmware

Backup Your Data:

Before you proceed, make sure to backup all important data as the flashing will delete everything on your device.
Back up important files, contacts, messages, and apps — including any cloud services, external storage, or backup tools.

Charge Your Device:

Before flashing the Realme C3i, you have to make sure that it has 50% or more battery, as it can also interrupt the process.
A smooth operation demands a fully charged device.

Download the Necessary Files:

Download the specific official firmware file for Realme C3 either from Realme’s official website or from other trusted sources.
Ensure that you download the correct firmware for your model to prevent incompatibility issues.

Install Necessary Tools:

Download and install the Realme Flash Tool on your PC, as it is needed to flash the firmware.
Download and install Realme C3i USB drivers on your PC (if in case, the device is not detected).

How To Flash Realme C3i Stock Firmware [Guide]

Unlock the Bootloader (If Necessary)
Unlock bootloader: While flashing firmware, it needs to have a bootloader unlocked — which is not supported in some Realme devices.
Please refer to the official Realme unlocking guide for the bootloader specific to your model.

Once ADB and Fastboot have been configured on your computer, we can proceed to the next step. 

Deploy USB Drivers on Your Computer:

Make sure you have the right USB drivers for Realme C3i installed.
You can visit the official Realme website and go to the support section to download these drivers.

Get Realme Flash Tool

First Download Realme Flash Tool Latest Version on your Computer from the official site.
Ensure that you have installed the tool on your PC and it had no error at the beginning.

Unpack the Firmware Package:

If your firmware file is compressed (ZIP or RAR), please unzip it into a folder on your computer.
Update all required firmware elements to be prepared and reachable.

Launch the Realme Flash Tool:

Open the Realme Flash Tool on your computer.
Ensure the tool is set up and operational before you proceed.

Load the Firmware
Now click on the Browse button in the Realme Flash Tool.
Choose the firmware file that you just extracted.
Ensure all files have been correctly loaded.

Link the Device to your Computer:

First of all, turn off your Realme C3i completely.
Connect your device to the computer with a great USB cable.
Hold down the Volume Down + Power buttons at the same time — this will take you into Fastboot Mode or Recovery Mode.

Flash the Firmware:

Once your device is detected, click on the Start button to start flashing.
Keep your device plugged in while it flashes.

Wait for Completion:

This process will take several minutes, so take your time.
We advise that you do not disconnect or interrupt your device during this period.

Reboot Your Device:

Your device might reboot itself after the flashing is done.
If it does not turn on, please press the Power button manually.
During the first boot, it may take a few minutes to set up the new system.

Main Key Things to Remember:

1. Prepare the device: Make sure that the battery on the unit is more than half charged before starting the flashing.
2. To prevent connection problems, use a USB cable of good quality and connect your device straight to a computer.
3. Please make sure you strongly follow all given instructions placed by your firmware documentation paired with the Realme Flash Tool.
4. Do note, that flashing stock firmware will erase everything on your device, so please take a backup of important files first.
5. This guide will work for flashing Realme MTK and Qualcomm devices. Note that the exact process may differ slightly based on your device model and firmware version.
6. Bear in mind that you always head for the official Realme docs and forums for more updates and help.

In this guide, we have discussed the steps through which you can flash Realme C3i stock firmware by following carefully.