My friend Heinrich is 72 years old and loves family gatherings. Last week, one of his grandchildren asked him if he wanted to install the Signal app on his cell phone—that way, they could send each other short text messages and photos. He didn’t want to ask his grandchild how to do it, so he called me. With the following guide, you can do it, too.
Download and install the app
In the App Store (iPhone) or Google Play Store ...
