To activate COVID-19 contact tracing notifications on your iPhone, you'll need to enable it in your Settings app.

It's easy to enable iMessage on an iPhone to send messages over cellular data or Wi-Fi with other iPhones, or over Wi-Fi with iPads or Mac computers.

Apple's highest level of security can ensure that only you have access to your data, but you'll want to keep a few safeguards in mind. I started my career with CNET all the way back in 2005, when the ...