You may have seen (if not read) articles about the vulnerability in Apple’s iOS that led the company to shut down Face Time. The risks to the software problem were real, as shown in this article. Apple has now released updates to 12.4.2 for iPhones, iPads, and for MacOS Mojave (but not for Apple Watches). My opinion is that this update is mandatory. Please perform the update now unless your device is set to update automatically. The first link says the vulnerability has already been exploited. The Forbes article masterfully describes the history of the problem and its slow solution.