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Fixing "Device Root Key" errors that prevent the phone from booting normally.
Use the built-in app to test:
Go to . Look for the 5th character from the right in the build number string. Example: G970USQS6HXD1 – The 6 indicates bit U6. g970u u6 combination
Always verify the file integrity:
: Combination files can help repair a device that has encountered software issues. This includes problems that prevent the device from booting or resetting, which can sometimes be resolved by flashing a combination file. Fixing "Device Root Key" errors that prevent the