GSM6 Community

Fix "Your Device is Corrupt. It Can't Be Trusted & May Not Work Properly" – Android (Active Slot Trick)

If your Pixel/Motorola/Lenovo/Nokia or any other Android Phone shows this warning on boot:
"Your device is corrupt. It can't be trusted & may not work properly"
...you likely have a mismatched or modified boot slot.

Good news — this can often be fixed just by switching the active slot back to the stock one!

Why This Happens
• You flashed Magisk, custom ROM, or patched boot only on one slot
• The other slot still has stock boot image
• Device boots from the modified slot → triggers warning

How to Fix It (By Changing Active Slot)

Step 1: Boot into Fastboot Mode
• Power off your phone
• Hold Volume Down + Power until Fastboot screen appears
• Connect to PC with USB cable

Step 2: Use fastboot to check current slot
Open CMD in your platform-tools folder and type:

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Example output:

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Step 3: Change to the other slot
If you're on slot a, switch to b:

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Or if you're on b, switch to a:

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Step 4: Reboot

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Now your device will boot using the other slot, which may not be patched and will load the clean boot image (no warning).

Tip:
• If both slots show the corrupt warning, you may need to flash stock firmware on both boot_a and boot_b.
• Use this command to flash to both:

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Final Notes
✔ This method works great if you only patched one slot (common with Magisk)
✔ You do NOT lose data when switching slots
✔ Fastboot slot switch is 100% safe and reversible (in some cases if you phone has any Memory Chip issues like in most cases with Google Pixel then risk will be all yours)

Download Link for Platform Tools & Recommended USB drivers (

)

— Posted by AM | gsm6.com
Your Android, fixed.