Is your POCO M7 5G or Redmi 14R 5G stuck on the boot screen, not detecting SIM, or showing “Invalid IMEI”? You’re not alone—many users face these issues due to system errors, failed updates, or accidental corruption. The good news? You can fix most of these problems yourself.
In this step-by-step guide, you’ll learn how to flash stock firmware and repair IMEI to bring your phone back to life.
📱 What is Stock Firmware and Why It Matters
Stock firmware (or stock ROM) is the official operating system pre-installed on your device by Xiaomi/POCO. Flashing it:
Fixes software-related boot issues and crashes
Restores original performance and features
Reverses rooting or custom ROM changes
Repairs broken system files, network, and sensors
Brings back a corrupted or lost IMEI
🛠️ When Should You Use Firmware?
You should consider flashing stock firmware if:
Phone is stuck in a bootloop
It’s soft-bricked (won’t turn on but goes to Fastboot)
IMEI is missing or invalid
Network/SIM issues occur
You want to unroot and go back to stock
You’re facing system crashes or overheating
✅ What You Need to Flash POCO M7 5G / Redmi 14R 5G
✔️ The correct Fastboot firmware (based on model & region)
Choose Fastboot ROM (.tgz) for POCO M7 5G or Redmi 14R 5G
Match your region (Global/India/China)
Step 2: Install Drivers and Mi Flash Tool
Install Xiaomi USB Drivers
Download and install Mi Flash Tool
Extract both firmware and Mi Flash Tool
Step 3: Boot into Fastboot Mode
Turn off the phone
Press Volume Down + Power until Fastboot screen appears
Connect to PC via USB
Step 4: Load ROM in Mi Flash Tool
Open Mi Flash Tool as Admin
Click Select and browse to the firmware folder
Choose the option: clean all
Click Flash
Step 5: Wait for Flash to Complete
The process takes 5–10 minutes
You’ll see a success message
The phone will auto-reboot
✅ Done! Your phone should now boot normally with fresh firmware.
📶 How to Repair IMEI (No Service, Invalid IMEI)
If you’re seeing “Invalid IMEI”, no network, or SIM not working, your IMEI may be corrupted.
⚠️ Only restore the original IMEI that came with your phone. Changing or cloning IMEI is illegal.
🔁 Method 1: QCN Restore (For Snapdragon)
Enable DIAG Mode using ADB: arduinoCopyEditadb shell setprop sys.usb.config diag,adb
Use QPST/QFIL Tool
Load your QCN backup file
Write back IMEI → Reboot the phone
🔁 Method 2: SN Writer Tool (For MediaTek variants)
Download SN Writer Tool and DB files
Connect phone in Meta Mode
Input original IMEI from phone box
Click Start and wait for completion
Reboot your phone
⚠️ Why Flashing the Right Firmware is Crucial
Flashing the wrong ROM can:
Damage network/baseband
Disable sensors, camera, or Wi-Fi
Cause bootloop or brick the phone
Always ensure:
✅ Correct model (POCO M7 5G vs Redmi 14R 5G)
✅ Matching region (India, Global, etc.)
✅ Matching chipset (Snapdragon or MediaTek)
❗ Common Flashing Errors and Solutions
Problem
Solution
Phone not detected
Reinstall USB drivers, change USB port
Flash tool stuck/freezing
Restart PC and re-extract firmware
Bootloop after flash
Boot to Recovery → Wipe data
Invalid IMEI remains
Try different IMEI tool (e.g. Maui META)
Flashing fails
Use another ROM version or PC
🧾 Final Thoughts
Flashing firmware on your POCO M7 5G / Redmi 14R 5G is one of the best ways to fix serious phone issues like bootloops, broken network, or IMEI problems. With the correct firmware, flashing tools, and a few precautions, you can restore your phone at home without visiting a service center.
