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Last Updated: March 14, 2026
Having trouble with your Infinix Note 50x X6857B? We’ve got the official Infinix Note 50x X6857B firmware, along with the latest USB Driver and Flash Tool, ready to help you fix whatever software glitches are bothering your phone.
Infinix Note 50x X6857B Firmware (Flash File) – Drivers, Tools & Guide
We’ve gathered the official firmware for your Infinix Note 50x X6857B smartphone. You’ll also find the SP Flash Tool and MediaTek USB drivers you need for the flashing process. Everything is conveniently packaged in a zip file, so you’ll need software like WinRAR or 7-Zip to unpack it on your computer. Just make sure the extracted firmware includes the scatter file – it’s crucial for flashing.
Before you dive into flashing your phone, it’s a good idea to double-check that your downloaded zip files aren’t corrupted and that they’re definitely for the Note 50x X6857B. You’ll need a Windows computer and a reliable USB cable to link your phone to it. It’s also wise to run a malware scan on your PC first. We’ve included a straightforward “How to Flash” guide to walk you through the steps.
Updating your Infinix device to its stock firmware can resolve a host of software issues. This includes things like FRP lock, app crashes, sluggish performance, forgotten screen locks, your phone getting stuck on the Infinix logo, Wi-Fi or Bluetooth connectivity problems, rapid battery drain, or even soft bricking.
FRP Bypass Tools for Your Infinix Note 50x X6857B
Sometimes, after flashing or a factory reset, you might run into a Google account lock, also known as FRP. If that happens, our free Android apps launcher can help you regain access to your phone.
Why Do We Need Infinix Note 50x X6857B Firmware?
The firmware is your phone’s operating system, and having the right version is key to keeping it running smoothly. It helps improve overall performance and fixes many common problems. Specifically, the stock ROM can:
- Unlock your device if it’s been locked.
- Update your phone to the latest version of Android.
- Fix annoying issues like the device restarting endlessly, lagging, or freezing.
- Resolve problems with over-the-air (OTA) updates and fix battery drain.
- Restore your phone to its original software state (stock ROM), which is important for keeping your warranty intact.
- Help if your phone only seems to start up into recovery mode.
A simple firmware update can really make your device more reliable and perform better. Want to know more about stock ROMs? You can learn more about stock rom here.
Choosing the Right Firmware Version
Before you start the flashing process, it’s really important to pick the correct firmware. Here’s how:
- Identify Your Device Model: Head to your phone’s “About Phone” section and confirm that the model is indeed the Infinix Note 50x X6857B.
- Verify the Build Number: Look for identifiers like “X6857B” within your device’s build details. This helps ensure you have the right software variant.
- Confirm the Chipset: According to the official specs, the Infinix Note 50x X6857B uses the Mediatek Dimensity 7300 Ultimate chipset. This is a 4 nm CPU with an octa-core setup (4×2.5 GHz Cortex-A78 & 4×2.0 GHz Cortex-A55) and a Mali-G615 MC2 GPU.
- Match the Firmware Version: Make sure the firmware version and regional details precisely match your device. Using the wrong firmware can cause compatibility problems.
- If you’re not totally sure about your chipset or firmware version, you can restart your device into recovery mode. You’ll find more device details there.
This way, you’ll know exactly which firmware to flash and which version is the safest bet to avoid any risks.
Firmware Details for Infinix Note 50x X6857B
Here’s a quick rundown of the official firmware details:
| Firmware Information | Details |
|---|---|
| Device Model | Infinix Note 50x X6857B |
| Firmware Version | OP001PF001AZ, IN001PF001AZ |
| File Size | 8.3 GB, 7.2 GB, 9.9 GB |
| Android Version | Android 15, eligible for up to 2 major Android upgrades, with XOS 15. |
| Platform | Mediatek Dimensity 7300 Ultimate (4 nm) CPU Octa-core (4×2.5 GHz Cortex-A78 & 4×2.0 GHz Cortex-A55) GPU Mali-G615 MC2 |
| Release Date | April 2025 |
| Region | Available globally, including Africa and Asia. |
| File Type | ZIP (Contains Scatter File [MT6xxx_Android_scatter.txt], Preloader.bin, boot.img, system.img, recovery.img, lk.bin, logo.bin, and more) Flashing Tool: SP Flash Tool |
Download Infinix Note 50x X6857B Firmware
You can grab the official stock firmware for your Infinix Note 50x X6857B from the links below:
| Software Details | Download Link | Members Link |
|---|---|---|
| File Name: Infinix_Note_50X_5G_X6857_MT6878_15.1.0.153SP05_OP001PF001AZ_280825_MXML.zip Size: 8.3 GB | Download Link | Download Link2 |
| File Name: Infinix_Note_50X_5G_X6857B_MT6878_15.0.3.129SP02_IN001PF001AZ_240625_MXML.zip Size: 7.2 GB | Download Link | Download Link2 |
| File Name: Infinix-Note-50X-5G-X6857-15.1.0.153SP05(OP001PF001AZ)-Flash-File-RMM.zip Size: 9.9 GB | Download Link | Download Link2 |
It’s really important to make sure the firmware version you download is a perfect match for your specific device model and regional settings.
Prerequisites
Before you jump into flashing, please make sure you have these things ready:
- Backup IMEI Numbers: Before you do anything, jot down and save your Infinix Note 50x X6857B’s IMEI numbers. You’ll need these if anything goes wrong with your network.
- Remove Google Accounts: Sign out of all Google accounts on your phone. This helps prevent any FRP lock issues after flashing.
- Backup Data: Seriously, back up everything important – your accounts, music, videos, photos. Flashing will wipe your device completely clean.
- A Fully Charged Device: Make sure your phone’s battery is at least at 50%. You don’t want it dying mid-flash.
- USB Cable & PC: You’ll need a good quality USB cable and a computer with working USB ports.
- Necessary Drivers: Download and install these drivers on your PC:
- Data Backup: I can’t stress this enough – back up your important data. It’s the only way to ensure you don’t lose anything during the flashing process.
How to Install Firmware on Infinix Note 50x X6857B
We’ll be flashing using the SP Flash Tool, and for devices with secure boot (SLA/DAA), we use the Download Agent. If you can’t find the Secure Boot Download Agent (DA) file for this specific model, you might need to try flashing with MTK Client instead. For now, let’s go through the steps using the MediaTek (MTK) SP Flash Tool:
- Download and Extract:
- First, download the correct firmware package for your device.
- Then, extract the contents of the ZIP file into a new folder on your computer.
- Install the Required Drivers:
- Make absolutely sure that both the VCOM Drivers and Infinix USB Drivers are properly installed on your PC.
- Launch the SP Flash Tool on your computer. If you don’t have it yet, you can download the latest version of SP Flash Tool for Windows or SP Flash Tool for Linux. For a more in-depth guide, check out the complete step-by-step SP Flash Tool flashing guide.
- Load the Scatter File:
- Click on the “Scatter-loading” button. Navigate to the folder where you extracted the firmware and select the “scatter.txt” file.
- Connect Your Device:
- Turn off your phone completely.
- Connect your phone to your PC using the USB cable. The SP Flash Tool should recognize your device automatically.
- Start Flashing:
- Click the “Download” button to begin the flashing process.
- Crucially, do not disconnect your device from the computer until the process is fully finished.
- Wait and Reboot:
- Once you see the confirmation that the flashing is complete, disconnect your device safely.
- Now, turn on your device. It should boot up into the newly installed firmware.
Missing IMEI or Corrupt Baseband After Flashing?
If you find yourself with missing IMEI numbers or a corrupt baseband after flashing, don’t panic. Just follow these steps:
- Check Drivers: Make sure you have the Mediatek CDC Driver and MediaTek (MTK) drivers installed correctly. Sometimes a driver issue can cause this.
- Use an IMEI Repair Tool: Tools like SN Write Tool or Maui Meta for MediaTek are designed to help restore your original IMEI. You can find more details on how to use the Write Tool or Maui Meta on YouTube.
- Run the Repair Tool:
- Connect your device to your computer.
- Enter your original IMEI numbers for both SIM slots.
- Click “Start” to begin the repair process.
- Restart Your Device: Once the tool finishes, reboot your phone. You can check if your IMEI is back by dialing *#06#.
Video Guide: How to use Maui META to repair IMEI
Credits for the video go to: https://www.youtube.com/@mhgsmclinic
Common Issues and Solutions
- Device Not Recognized by PC:
- First, double-check that you’ve installed all the necessary drivers correctly.
- Try using a different USB cable or a different USB port on your computer.
- Boot Loop After Flashing:
- If your device keeps restarting after flashing, try booting into recovery mode and performing a factory reset.
- Flashing Errors:
- Make sure you’ve selected the correct scatter file and that the firmware version is the exact match for your device model.
Frequently Asked Questions (FAQs)
Q1: Will flashing the firmware erase my data?
A: Yes, flashing the firmware is like giving your phone a fresh start, so it will reset your device to its factory settings. Please remember to back up all your important data before you begin.
Q2: Is this firmware compatible with other Infinix models?
A: No, this firmware is exclusively for the Infinix Note 50x X6857B. Using it on any other device could cause serious problems.
Q3: Can I downgrade my firmware version?
A: We generally advise against downgrading your firmware. It can sometimes lead to security vulnerabilities or compatibility issues down the line.
Q4: What should I do if I encounter an FRP lock after flashing?
A: If you run into an FRP lock, our free Android apps launcher is designed to help you get past those Google account lock issues quickly.
Q5: Are custom ROM options available for the Infinix Note 50x X6857B?
A: This guide focuses specifically on the official stock firmware. For custom ROMs, you might want to check out our Custom ROMs page, or explore trusted tech forums like XDA Developers. Beebom also has some great resources.
Conclusion
By following this step-by-step guide, you should be able to safely flash the official stock firmware onto your Infinix Note 50x X6857B. This will help restore its optimal performance, stability, and security. If you run into any trouble or have more questions, feel free to leave a comment below, and we’ll do our best to help.
Keep your device running smoothly by staying updated with the latest firmware releases and tech tips. You can subscribe to our newsletter or follow us on social media to stay in the loop.
Disclaimer: Flashing stock firmware is a process you undertake at your own risk. Please follow the instructions very carefully to avoid any potential damage to your device.
