Google Pixel Bootloader Lock/Relock error invalid images fix

[AM]

How to Relock Bootloader on Google Pixel 6/7/8/9 After IMEI Repair or Custom Firmware

If you repaired IMEI or installed custom firmware on your Pixel, some apps (like Google Pay or banking apps) might stop working. The best fix is relocking the bootloader after the job is done.

Why Should You Relock the Bootloader?

✔ Google Pay & banking apps work again
✔ Removes “Device is corrupt” warnings
✔ Passes SafetyNet & Play Integrity
✔ Restores full system security

What You’ll Need

•

📌 Please login or register to view this link.

•

📌 Please login or register to view this link.

•

📌 Please login or register to view this link.

Steps to Relock the Bootloader

1. Enable Developer Options
• Go to Settings > About phone → tap Build number 7 times
• Then go to Settings > Developer Options
• Enable OEM Unlocking and USB Debugging

2. Boot into Fastboot Mode
• Power off your phone
• Hold Volume Down + Power until Fastboot screen appears
• Connect your phone to PC via USB

3. (Optional) Flash Stock ROM
If your device had IMEI repair or custom firmware, you should flash stock firmware first.
• Extract downloaded firmware
• Place files inside platform-tools folder
• Run:

Please

📌 Please login or register to view this link.

or

📌 Please login or register to view this link.

to see this code

• Phone will reboot after flashing

4. Relock the Bootloader
• Open the platform-tools folder
• Type cmd in the address bar and hit Enter
• Run this command:

Please

📌 Please login or register to view this link.

or

📌 Please login or register to view this link.

to see this code

• Use Volume keys on your phone to choose Lock the Bootloader, then press Power to confirm

Confirm Bootloader is Locked
To verify, use this:

Please

📌 Please login or register to view this link.

or

📌 Please login or register to view this link.

to see this code

If it shows:

Please

📌 Please login or register to view this link.

or

📌 Please login or register to view this link.

to see this code

Then your bootloader is successfully relocked!

Common Error Fix

Error: Failed (Remote: 'Invalid Android Image, Skip Locking')
• Flash correct stock firmware
• Reboot to Fastboot and try again

FAQs

Will this erase my data?
✔ Yes, relocking will factory reset your phone.

Can I unlock the bootloader again later?
✔ Yes, but it will wipe all your data again.

Why are banking apps not working after IMEI repair?
Google blocks rooted/unlocked phones. Relocking restores trust & security.

If you're stuck or need help, reply below with your Pixel model and build number.
Video guide also available – check comments or PM me.

— Posted by AM – gsm6.com
Your Pixel, fixed.

[mrzed341]

I downloaded the latest factory image for the Pixel 6 (Dec 2025), but the flash.bat file was missing. I tried downloading it again, and even tried the previous release, but the file was still missing. Could you help me figure out how to fix this issue?

[AM]

Flash_all.bat is there.. i just downloaded the firmware to verify

📌 Please login or register to view this link.

[Expert_Moin]

Flash_all.bat not found

📌 Please login or register to view this link.

[AM]

You have shared AOSP build link.. you can flash that by recovery only
.
Get the correct fastboot builds from here

📌 Please login or register to view this link.

[hassan1131]

Kindly tell me the method without deleting data and IMEI repair.

[AM]

Kindly tell me the method without deleting data and IMEI repair.

you cannot unlock/relock bootloader without losing data.