Using a voice command is another option: Say “Hey Google, call…” or “Hey Siri, call…” followed by the name of a contact to ring them up. For that you’ll need to have your phone’s assistant listening automatically, though. On the iOS Settings, go to Siri & Search and then Listen for “Hey Siri”. On the Android settings, go to Apps and notifications, Assistant, and then Say “Hey Google”. Alternatively, you can activate the assistant with a long press on the side button (on iOS), or a swipe up from the bottom corner of the home screen (on Android).