Powered by AI, the Realme 12 takes smooth performance to the next level. Slash through lag and delay, and tap into high-powered gaming even at high frames. On this page, we will guide you on downloading and installing the official firmware file on Realme 12 4G RMX3871. This tutorial is easy to follow. Realme 12 4G is powered by a Qualcomm SM6225 Snapdragon 685 processor powered by Android 14 under Realme UI 5.0.
If you are facing software issues such as WiFi or Bluetooth issues, lag, boot loop, or hard brick, you can fix the device by following this tutorial. Using the firmware file lets you bypass FRP lock, pattern lock, downgrade, or upgrade, and you can fix most software glitches by flashing the stock firmware.
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Realme 12 4G Specification:
The Realme 12 4G, released in July 2024, is a well-rounded mid-range smartphone that brings a blend of performance, style, and practicality. The device features a sleek design with a 6.67-inch AMOLED display, offering a vibrant viewing experience with a 120Hz refresh rate and a peak brightness of 2000 nits, ensuring excellent visibility even under bright sunlight. The screen, with a resolution of 1080 x 2400 pixels, occupies a substantial portion of the front, thanks to its 87.3% screen-to-body ratio.
The Realme 12 4G is powered by the Qualcomm Snapdragon 685 chipset, coupled with 8GB of RAM and storage options ranging from 128GB to 512GB, expandable via microSDXC. This setup provides smooth performance for day-to-day tasks and moderate gaming. The dual-camera system on the rear includes a 50 MP primary sensor with PDAF and OIS, ensuring sharp and stable photos, along with a 2 MP depth sensor for portrait shots. The 16 MP front-facing camera handles selfies and video calls with ease, supported by features like HDR and panorama mode.
In addition to its performance, the Realme 12 4G stands out with its practical features, including IP54 dust and splash resistance, making it more durable for everyday use. It also includes dual speakers with Hi-Res audio support and a 3.5mm headphone jack for an immersive audio experience.
The device is equipped with a 5000 mAh battery, offering long-lasting power, and supports 67W fast charging, which can charge the battery to 50% in just 19 minutes. Running on Android 14 with Realme UI 5.0, the Realme 12 4G provides a modern, user-friendly interface and up-to-date software, making it a solid choice for users seeking a reliable and stylish smartphone with a good balance of features and performance.
Advantages of Installing Stock ROM
Here are some of the advantages of installing firmware files on your Realme 12 4G RMX3871:
- 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 Adwares from Realme 12 4G
- You can fix the boot loop issue on Realme 12 4G
- Fix Unfortunately, the app has stopped errors on Realme 12 4G
- Fix Network related issue
- Patch Boot image to Root using Magisk: Mediatek Guide or Spreadtrum Guide
- You can unroot Realme 12 4G
- To Reset or Remove FRP on your device: Mediatek FRP Guide or Spreadtrum FRP Guide
- Restore Realme 12 4G back to Factory State
Firmware Details
- Device Name: Realme 12 4G RMX3871
- Gapps File: Included
- Tool Supported: Qualcomm Flash Tool
- Processor: Qualcomm SM6225 Snapdragon 685
- Android OS: 14.0
Steps to Install Stock Firmware on Realme 12 4G RMX3871
Now, before we get straight to the Steps to Install Stock Firmware on Realme 12 4G RMX3871, let us take a look at some of the prerequisites.
Pre-Requirements:
- Supported device: Realme 12 4G RMX3871
- 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
- Download Drivers and Tools: Qualcomm drivers, QPST Flash Tool, and Realme USB Drivers
Realme 12 4G RMX3871 Flash Files
| Software Update | Download Link |
| File Name: Realme_12_RMX3871_EX_11_14.0.1.508_EX01_240603_QFIL
File Size: 20.97 GB Android: 14.0 |
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 QFIL Tool:
Download the Qualcomm Flash image loader tool and USB Drivers on your PC. Follow the below link to install the firmware using the QFIL tool
Guide to Install Stock ROM using QFIL Tool
Guide to Install Stock ROM using QPST Tool
Method 3: Instructions to Install via MSM Download tool:
- Download the MSM Download tool, firmware, and drivers on your PC.
- Now install the USB drivers.
- Place the MSM download tool and firmware in the same folder
- Open the MSM download tool and connect your device to a PC/Laptop
- Once you connect, it will automatically load the firmware; if not, select it manually.
- Click on the start button and wait patiently to complete the installation process.
- Once it is done! Remove your device from the PC. That’s it!
So that’s it, guys; this was our take on How to flash the firmware file on Realme 12 4G. We hope that you found this post useful. Let us know what you guys think about it in the comments below.