How to Install Stock ROM on Realme C21Y RMX3261 (Firmware Guide)

On this page, we will guide you on how to install the firmware file on Realme C21Y RMX3261 based on Android 10. This device is powered by the latest Spreadtrum Unisoc T610 chipset which comes in decent specifications and a budget price. If you’re using the Realme C21Y handset, then you can check out the full guide on the steps and requirements to flash Stock ROM.

Some of the users may experience soft brick or device boot loop issues while flashing any Custom ROM. That may happen during or after installing the Custom ROM or any mod files as well. Meanwhile, it’s necessary to revert to the stock ROM again to fix the temporary issue.

In order to flash the firmware file on your Realme C21Y device which is powered by the Spreadtrum chipset requires SPD Flash Tool and some drivers, and proper guidance. Here in this article, we will share with you the tutorial of installing stock firmware easily.

Realme C21Y RMX3261 Firmware Flash File (Stock ROM)

Stock Firmware and its Advantages

A Stock ROM or Firmware is official software crafted and developed by the official manufacturer for a particular device. It will be stable and almost bug-free as well. The Stock ROM comes with necessary system files and applications which provides a better user experience than a custom ROM.

Though a Custom ROM offers customizations and tweaks, it has some security issues possibly. You can’t really rely on a Custom ROM as compared to the Stock ROM. Whereas, you can also fix some of the device issues as well:

  • You can fix the soft brick issue on your Realme C21Y.
  • It Fixes the boot loop and instability issue as well.
  • You can skip the Screen Lock and remove malware as well.
  • You will get preloaded Google Applications as well.
  • To upgrade or downgrade your Realme C21Y.
  • To fix bugs lags on your Android Device.
  • You Can Remove the root on your device [Unroot]
  • You can Restore Stock ROM after using Custom ROM.
  • This Software Update helps to solve the issue with WiFi, Bluetooth, and more.

Firmware Details:

  • Device Model: Realme C21Y RMX3261
  • Required Tool: SPD Flash Tool
  • Processor: Spreadtrum Unisoc T610 SoC
  • Android OS Version: Android 10
  • File: Stock Firmware Update
  • Gapps: Included

Steps to Install Firmware File on Realme C21Y

Check out the pre-requirements and the download links of the firmware file and SPD Flash Tool file given below:

Download Firmware Files:

  • Firmware File Name: RMX3261_11_A.51
  • File Size: 4.2 GB
  • Version: Android 10
  • Firmware File Name: RMX3261_11_A.37
  • File Size: 4.2 GB
  • Version: Android 10
  • Firmware File Name: RMX3261_11_A.31
  • File Size: 4.2 GB
  • Version: Android 10



  • The ROM file is only for the Realme C21Y handset. Don’t try this ROM on any other device.
  • Keep your device battery charged up to 50%-60% at least for a smoother process.
  • Make sure to keep a device backup at first before starting the flashing process.
  • You need a Windows PC/Laptop for installing the drivers and connect your device for the flashing process.
  • A USB cable for your device as well to connect your device to the PC.
  • Download Spreadtrum Flash tool – Make sure that you have downloaded and installed the latest SPD Flash Tool on your PC
  • USB Drivers: Download Realme USB Drivers
We’re at GetDroidTips will not be responsible for any type of error that occurs to your device while or after following this guide. Do it at your own risk.

Follow the links provided below to get a full in-depth guide on how to install a firmware file on the Realme C21Y device easily.

Steps to Flash Stock Firmware Using SPD Flash Tool

I hope this guide is useful to upgrade the firmware file on Realme C21Y.

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