Realme 12X 5G RMX3998 Firmware Flash File (Download Stock ROM)

This page will guide you in installing the official stock Firmware flash file on your Realme 12X 5G RMX3998. The device is based on Android 14, which the...

Mohammed Huwais

Last updated on January 2, 2025

Mohammed Huwais

Author

I started my career as a blogger in 2014 and also worked on an Android niche platform to gain extra income. I cover the topic on How to guides, software updates, Custom ROM updates and also product review. I'm 24 years old, completed MBA (Master of Business Administration) from Sikkim Manipal University.

Realme 12X 5G Device Overview:

The Realme 12X 5G, released on April 2024, is a budget-friendly 5G smartphone with reliable performance and essential features. It sports a 6.67-inch IPS LCD display with a 120Hz refresh rate, ensuring smooth visuals, though the 720p resolution might appeal more to casual users.

Powered by the MediaTek Dimensity 6100+ (6 nm) chipset, it provides efficient multitasking with options for up to 12GB RAM and 512GB storage, expandable via a dedicated microSD slot. The device is IP54 rated, offering dust and splash resistance, and its 5000 mAh battery supports 15W charging, ensuring decent longevity for everyday use.

On the camera front, the dual rear setup features a 50 MP main sensor for detailed shots and a 2 MP depth sensor for portraits, while the 8 MP front camera caters to selfies and video calls. Additional features include a side-mounted fingerprint sensor, Bluetooth 5.3, dual-band Wi-Fi, and NFC for enhanced connectivity. The inclusion of a 3.5mm headphone jack and expandable storage makes it a practical choice for budget-conscious users seeking modern features in a 5G-capable device.

Advantages of Stock ROM:

Here are the answers to why you need to download and save the Realme 12X 5G Stock ROM flash file on your computer.

If your device is dead, you can unbrick using the Stock ROM file
You can fix or repair the IMEI on your device using DB files from Stock ROM
Remove any malware or adware from Realme 12X 5G
You can fix the boot loop issue on Realme 12X 5G
Fix Unfortunately, the app has stopped errors on Realme 12X 5G
Fix Network related issue
Patch Boot image to Root using Magisk: Mediatek Guide or Spreadtrum Guide
You can unroot Realme 12X 5G
To Reset or Remove FRP on your device: Mediatek FRP Guide or Spreadtrum FRP Guide
Restore Realme 12X 5G to Factory State

Steps to Install Stock Firmware on Realme 12X 5G RMX3998

Before we get straight to the Steps to install stock firmware on Realme 12X 5G RMX3998, let us look at some of the prerequisites.

Pre-Requirements:

Supported device: Realme 12X 5G RMX3998
Make sure to charge your device more than 50%
You need a PC or Laptop with a USB cable.
Take a complete backup using any method given below
- Full Data Backup without Root
- Nandroid Backup via TWRP
Download Drivers and Tools: VCOM drivers, SP Flash Tool, and Realme USB Drivers

Download Flash Files

Software Version

Download Link

Flash File Name: Realme_12X_5G_RMX3998_MT6835_11_14.0.1.522_EX01_240629_MXML

File Size: 6.79 GB

Download

Method 1: Instructions to Install via Recovery:

First, you can try the official method to install the OTA stock ROM update via Realme device recovery.

Method 2: Instructions to Install via SP Flash Tool

Now, without wasting any more time, let’s jump into the firmware installation steps below:

Make sure you follow and download all the required files and flash tools on your PC.
Open the flash tool exe file to open the SP Flash Tool User Interface
Once your load the SP Flash tool UI, Tap on the Download option
In the download tab, you have to load both the download agent and the scatter text file in the scatter-loading section.
You will find the scatter text file inside the ROM package for most cases, if not, you can create a scatter text file on your own.
Once you load the file, click the Download button
To start the upgrade process of stock ROM on your Realme 12X 5G, you need to turn off your device and hold the Volume Down and Volume Up keys together and Connect your Phone to your PC/Laptop using a USB Cable (Keep the Volume Down and Volume Up button until your computer detects the phone.)
When the phone connects, your device will start upgrading the stock firmware
You need to wait for a few minutes to complete the upgrade process.
Once the flashing process completes, you will find a green button which means a successful upgrade.
That’s it! You can reboot your Realme 12X 5G

Follow our full-depth video guide below

So that’s it guys, this was our take on How to flash the firmware file on Realme 12X 5G. We hope that you found this post useful. Let us know what you guys think about it in the comments section down below.