Infinix Note 50X 5G (X6857B) Stock Firmware ROM (Flash File) DOWNLOAD and GUIDE

Introduction

The Infinix Note 50X 5G (Model: X6857B) is a stylish and powerful mid-range smartphone featuring 5G connectivity, a high-refresh-rate display, and a MediaTek Dimensity processor. It runs on Android 13 or 14 with XOS and is designed for smooth multitasking and entertainment.

Despite its performance, the Note 50X 5G can occasionally face software-related issues—such as being stuck on the boot screen, app crashes, forgotten passwords, or failed updates. In these situations, flashing the official Infinix stock firmware (also called a flash file or ROM) can help bring your phone back to life.

This article covers everything you need to know about the Infinix Note 50X 5G X6857B firmware, including when and how to flash it safely using SP Flash Tool.

What Is Stock Firmware?

Stock firmware is the official software package developed by Infinix for your phone. It includes the operating system (Android), Infinix’s user interface (XOS), and all system components that make the phone run properly.

Flashing the stock firmware replaces corrupted, bricked, or outdated software with a clean, factory-stable version.

Why Flash Infinix Note 50X 5G Firmware?

You may need to flash the stock ROM if your device:

🔁 Is stuck on the Infinix logo or in a bootloop
🔒 Has a forgotten password, pattern, or PIN (note: this wipes data)
🧱 Is bricked after a failed root, custom ROM, or system update
⚠️ Suffers from crashing apps or unstable system performance
📶 Shows “no service”, invalid IMEI, or baseband issues
🔄 Needs a manual Android upgrade or downgrade
🔓 Requires FRP (Google Account) lock removal in some cases

Infinix Note 50X 5G (X6857B) Firmware Details

Firmware Property	Details
Device Name	Infinix Note 50X 5G
Model Number	X6857B
Android Version	Android 13 or 14 (varies by release)
XOS Version	XOS 13 or 14
Chipset (SoC)	MediaTek Dimensity (likely Dimensity 6100+ or 7020)
Firmware Type	Official Stock ROM
Firmware Format	Scatter File (.txt)
Tool Required	SP Flash Tool
File Size	~3.5 GB (varies)
Status	Official & Stable

⚠️ Always verify your exact model number (X6857B) before flashing.

Prerequisites for Flashing

Before flashing, ensure you have:

✅ A Windows PC or Laptop
✅ SP Flash Tool (Smart Phone Flash Tool)
✅ MediaTek USB VCOM Drivers
✅ The correct firmware package for Infinix X6857B
✅ A working USB cable
✅ At least 60% battery charge
✅ Backup of your data (flashing erases all data)

👇 𝗖𝗹𝗶𝗰𝗸 𝗛𝗲𝗿𝗲 𝗧𝗼 𝗗𝗼𝘄𝗻𝗹𝗼𝗮𝗱

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How to Flash Infinix Note 50X 5G (X6857B) Stock Firmware

⚠️ Disclaimer:

Flashing can fix many issues, but it also carries risks. Do this only if you’re confident, or seek expert help. Flashing will erase all your personal data.

🔧 Step-by-Step Flashing Guide

Step 1: Extract the Firmware

Download and extract the official Infinix X6857B firmware ZIP file
Locate the scatter file (e.g., MT68xx_Android_scatter.txt)

Step 2: Install Drivers

Install MediaTek USB VCOM Drivers on your PC
Restart your computer to complete the driver installation

Step 3: Open SP Flash Tool

Launch SP Flash Tool (as Administrator)
Click “Choose” next to “Scatter-loading File” and select the .txt scatter file

Step 4: Load and Configure

Mode: Select Download Only
(Optional) Uncheck Preloader if unsure, to avoid potential bricking

Step 5: Begin Flashing

Power off your phone completely
Click Download in SP Flash Tool
Connect the phone to PC using USB cable (hold Volume Down or Up if required)
Flashing should begin automatically

Step 6: Flash Complete

Wait for the process to finish
A green checkmark or “Download OK” will appear
Disconnect your phone and power it on (first boot may take 5–10 minutes)

After Flashing

After a successful flash:

Go through the Android setup process
Verify network, IMEI (*#06#), SIM, Wi-Fi, camera, fingerprint, etc.
Update system apps via Settings > System Updates
If any issue remains, consider doing a factory reset from recovery mode

Common Flashing Errors & Fixes

Issue	Solution
Phone not detected	Reinstall drivers, use another USB port/cable
Flash fails midway	Try another SP Flash Tool version, uncheck Preloader
Bootloop after flash	Perform factory reset via recovery
IMEI missing / Invalid	Use MTK Meta Utility or SN Writer to restore
Error: "BROM ERROR"	Use correct scatter file or check driver installation

Pro Tips

✅ Use only firmware specifically made for X6857B
❌ Don’t interrupt the process while flashing is ongoing
⚠ Avoid “Format All + Download” unless absolutely necessary
🔐 Keep a copy of your IMEI/NVRAM before flashing (advanced users)