FutureRestore-GUI
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A9Downgrade will happen as follows, I only test on SE.
Request URL set to https://gs.apple.com/TSS/controller?action=2 Sending TSS request attempt 1... response successfully received Received Baseband SHSH blobs Sending BasebandData now... Done sending BasebandData Updating Baseband completed. Updating SE Firmware (59) Unknown data request 'FirmwareUpdaterPreflight' received
Does the restore end with "unable to restore device," or is it still successful?
unable to restore device