A simple way to check this is by holding the Volume Up and Power buttons together while the phone is switched off. Your phone doesn’t boot into Fastboot and Recovery modes even after pressing the proper button combination.That’s because the secondary bootloader is inaccessible. Your phone shows a black screen and might just vibrate when connected to the wall charger.Your phone shows the ‘ Your Device is corrupt‘ message while booting.So how do you differentiate if your phone has been soft-bricked or hard-bricked? Below are some of the signs that could help you figure this out. Soft-brick or Hard-brick), your OnePlus 6/6T may bootloop or stay stuck at the OnePlus boot screen. Step 4: Flash Decrypted OxygenOS Firmware on OnePlus 6/6T using MSMDownload Tool.Step 3: Install Qualcomm USB Drivers on the PC.Step 2: Launch MSMDownload Tool and Boot OnePlus 6/6T into EDL Mode.Step 1: Download Decrypted Stock OxygenOS Firmware.