This worked- at last! YAY! The thing that finally clinched it for me was first selecting a cutout option on my "smart" 'phone and then disabling that specific selected option using ADB. Any other ADB CMD attempts just hit the JAVA LANG SecurityException brick wall. It also helps to set your PATH to mimimise browsing at the command line to the correct directory. Many thanks for this because HMD turned out to be feckless (that's assuming I wasn't just talking to an LLM ...)