Introduction
The Infinix Hot 50i (Model: X6531B) is a budget-friendly smartphone running on Android 13 (Go Edition). It offers decent performance for everyday tasks like calling, browsing, and social media. Powered by a UniSoC chipset, it delivers power efficiency and reliability in a stylish design.
Despite its optimized software, issues such as boot loops, system crashes, or software corruption may occur. When such problems arise, flashing the official stock firmware (flash file) is the best way to restore the device to factory condition.
This article provides a full guide for flashing the Infinix Hot 50i X6531B stock firmware using the right tools and procedures.
What Is Stock Firmware?
Stock firmware, also known as a flash file or stock ROM, is the official software provided by Infinix for your specific phone model. It contains:
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Android OS
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XOS interface
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System partitions and drivers
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Factory settings and security updates
Flashing the firmware helps fix most software-related issues and brings your phone back to a clean, working state.
Why Flash the Infinix Hot 50i Firmware?
You might need to flash your device if you experience:
🔁 Boot loop or stuck on the Infinix logo
🧱 Soft-brick from a failed update or rooting
🔒 Forgot lock screen pattern, PIN, or password
⚠️ Lagging or crashing apps
🆙 Manual upgrade or downgrade of Android OS
🔄 Remove FRP lock (Google account)
📶 Network, baseband, or IMEI-related problems
Infinix Hot 50i (X6531B) Firmware Information
| Property | Details |
|---|---|
| Device Name | Infinix Hot 50i |
| Model Number | X6531B |
| Android Version | Android 13 (Go Edition) |
| XOS Version | XOS 13 (Lite) |
| Processor (SoC) | UniSoC SC9863A |
| Firmware Type | Official Stock ROM |
| Firmware Format | PAC File |
| Flash Tool Needed | SPD/Spreadtrum Upgrade Tool |
| File Size | ~1.5 – 2.0 GB |
⚠️ Note: This model uses a UniSoC processor, so the firmware format and flash tool differ from MediaTek-based devices.
Before You Begin – Requirements
You will need the following:
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A Windows PC or laptop
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Infinix Hot 50i X6531B firmware (unzipped PAC file)
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SPD Flash Tool (ResearchDownload or UpgradeDownload)
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SPD USB Drivers (UniSoC drivers) installed
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Original or high-quality USB cable
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At least 60% battery
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Backup of all personal data (flashing wipes everything)
👇 𝗖𝗹𝗶𝗰𝗸 𝗛𝗲𝗿𝗲 𝗧𝗼 𝗗𝗼𝘄𝗻𝗹𝗼𝗮𝗱
How to Flash Infinix Hot 50i (X6531B) Stock Firmware
⚠️ Disclaimer: Flashing firmware improperly may permanently damage your device. Follow the instructions carefully and proceed at your own risk.
🔧 Flashing Instructions Using SPD Upgrade Tool
Step 1: Install SPD Drivers
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Install UniSoC/Spreadtrum USB drivers on your PC
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Restart your system if required
Step 2: Extract the Firmware
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Unzip the downloaded firmware package
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Ensure you have a .PAC file inside the folder
Step 3: Launch SPD Flash Tool
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Open UpgradeDownload.exe or ResearchDownload.exe
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Click on the “Load Packet” icon and browse to select the
.PACfile
Step 4: Start Flashing Process
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Click the “Start Downloading” button
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Power off your phone
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Connect it via USB (press Volume Down if needed)
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Flashing will begin automatically
Step 5: Wait for Completion
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Wait until you see a green “Passed” message
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Disconnect the phone and reboot manually
Step 6: First Boot
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The first boot may take several minutes — be patient
After Flashing
After flashing your device:
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Complete the initial setup (language, Wi-Fi, Google account)
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Check basic functions: touchscreen, SIM, Wi-Fi, audio, camera
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Dial *#06# to check if your IMEI is intact
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Update apps and system via Settings if needed
Common Flashing Errors & Fixes
| Issue | Solution |
|---|---|
| Device not detected | Reinstall UniSoC drivers, change USB port/cable |
| Flash tool stuck or fails | Try a different SPD tool version |
| IMEI is missing | Restore using WriteIMEI or SPD tools |
| Bootloop after flashing | Perform a factory reset via recovery mode |
Tips & Precautions
✅ Confirm the exact model number is X6531B before flashing
🔌 Use a reliable USB connection and don’t disconnect during flashing
🧠 Backup all data before flashing
📁 Choose firmware that matches your region (if multiple variants exist)
🔐 Some firmware may reset FRP lock
Final Thoughts
Flashing the Infinix Hot 50i (X6531B) firmware is the most effective way to fix system issues, remove screen locks, or recover from software failure. As long as you follow the correct steps and use the appropriate tools, the process is straightforward and safe.
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