I had just installed (including a migration from an old iMac) a new iMac with the latest software and backed up my iPhone12 to the Mac I left the iPhone attached to the iMac. when I came back the phone told me the SIM card was locked. It wouldn't, however, let me put any numbers in and I kept getting fast acoustic messages about the keys I touched on the screen, a feature I had activated for the iMac!. The phone had previously been activated for face recognition, the iMac for finger print. I did the side button combination (top left, quick; bottom left, quick; right longer and the Power off motive lights up but doesn't work. This can be repeated without being physically connected to the iMac. My phone and now my IWatch are not seen by my IMac although they were a few hours before. What on Earth is happening here? I see here no rhyme nor reason.