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Flashing the stock firmware replaces corrupted, bricked, or outdated software with a clean, factory-stable version.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:
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🔁 Is stuck on the Infinix logo or in a bootloop
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🔒 Has a forgotten password, pattern, or PIN (note: this wipes data)
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🧱 Is bricked after a failed root, custom ROM, or system update
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⚠️ Suffers from crashing apps or unstable system performance
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📶 Shows “no service”, invalid IMEI, or baseband issues
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🔄 Needs a manual Android upgrade or downgrade
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🔓 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:
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✅ A Windows PC or Laptop
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✅ SP Flash Tool (Smart Phone Flash Tool)
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✅ MediaTek USB VCOM Drivers
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✅ The correct firmware package for Infinix X6857B
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✅ A working USB cable
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✅ At least 60% battery charge
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✅ Backup of your data (flashing erases all data)
👇 𝗖𝗹𝗶𝗰𝗸 𝗛𝗲𝗿𝗲 𝗧𝗼 𝗗𝗼𝘄𝗻𝗹𝗼𝗮𝗱
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
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Download and extract the official Infinix X6857B firmware ZIP file
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Locate the scatter file (e.g.,
MT68xx_Android_scatter.txt)
Step 2: Install Drivers
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Install MediaTek USB VCOM Drivers on your PC
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Restart your computer to complete the driver installation
Step 3: Open SP Flash Tool
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Launch SP Flash Tool (as Administrator)
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Click “Choose” next to “Scatter-loading File” and select the
.txtscatter file
Step 4: Load and Configure
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Mode: Select Download Only
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(Optional) Uncheck Preloader if unsure, to avoid potential bricking
Step 5: Begin Flashing
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Power off your phone completely
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Click Download in SP Flash Tool
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Connect the phone to PC using USB cable (hold Volume Down or Up if required)
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Flashing should begin automatically
Step 6: Flash Complete
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Wait for the process to finish
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A green checkmark or “Download OK” will appear
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Disconnect your phone and power it on (first boot may take 5–10 minutes)
After Flashing
After a successful flash:
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Go through the Android setup process
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Verify network, IMEI (
*#06#), SIM, Wi-Fi, camera, fingerprint, etc. -
Update system apps via Settings > System Updates
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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
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✅ Use only firmware specifically made for X6857B
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❌ Don’t interrupt the process while flashing is ongoing
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⚠ Avoid “Format All + Download” unless absolutely necessary
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🔐 Keep a copy of your IMEI/NVRAM before flashing (advanced users)
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