Realme 12X 5G Firmware Flash File [Stock ROM]

Get the official stock firmware for Realme 12X 5G (Model: RMX3997), based on RealmeUI 6.0 and Android 15. The Stock firmware is the official software that comes pre-installed on your Realme device. Flashing the stock ROM can help you fix common software issues like:

✅ Your phone is bricked, stuck in a bootloop, or won’t turn on
✅ You forgot your password, PIN, or pattern
✅ You want to upgrade/downgrade your software
✅ You’re fixing bugs, crashing apps, or a sluggish device
✅ You need to remove FRP (Google account lock)

🔔 Note: This page shows only one firmware update for the selected model. If you’re searching for a different version or another Realme model, 👉 [click here to browse all available downloads].

📦 Download Realme 12X 5G Firmware (Stock ROM)

Device Name: Realme 12X 5G
Model Number: RMX3997
Firmware Version: RMX3997export_11_15.0.0.602EX01_2025030111540114.zip
UI Version: realme UI 6.0
Android Version: 15
Region: India/Global
File Size: 22.4 GB
File Format: .zip
Project No: 23681
Status: Official

Download

Device Name: Realme 12X 5G
Model Number: RMX3997
Firmware Version: RMX3997export_11_14.0.1.517(EX01)_2024093013560000
UI Version: realme UI 5.0
Android Version: 14
Region: India/Global
File Size: 22.80 GB
File Format: .zip
Project No: 23681
Status: Official

Download

About Realme 12X 5G

Realme 12X 5G is powered by the MediaTek Dimensity 6100+ (6nm) chipset and runs Android 14 with Realme UI 5.0. It comes in 6GB, 8GB, and 12GB RAM options with 128GB, 256GB, and 512GB storage. The phone has a 5000mAh battery with 15W fast charging and includes a dedicated SD card slot for storage expansion.

How to Flash Firmware Stock ROM on Realme 12X 5G

Required:

MSM Download Tool (Recommended for EDL Mode)
Realme Flash Tool (Fastboot mode – Some versions may not support all models)
SP Flash Tool
MediaTek USB Drivers

Flashing Instructions:

Install MTK USB VCOM drivers on your PC.
Extract the firmware zip. Find the scatter.txt file inside the firmware folder.
Open SP Flash Tool.
Click “Choose” next to the “Scatter-loading File” option and select the scatter.txt.
Set Download Only or Firmware Upgrade mode.
Turn off your phone completely.
Click Download in SP Flash Tool.
Connect the phone to the PC via USB.
The flashing will begin automatically. Wait for a green checkmark.
Disconnect and power on your device.

If the phone doesn’t connect, try holding Volume Down while plugging in the USB.

Important Notes

Make sure your phone has at least 50% battery
Use a good-quality or original USB cable
Back up your data – this process erases everything
Do NOT interrupt the process once it starts
Only use firmware designed for Realme 12X 5G

🤝Need help with flashing or getting tools? You can contact us or leave a comment below.

Realme 12X 5G