How to use walkie talkie feature on Apple Watch
All you need is an iPhone running iOS 12.4, with FaceTime turned on, and an Apple Watch running WatchOS 5.3
Initial setup is expected to take 1 minute, while subsequent connections should be established almost instantly.
Step 1: Open the app and invite your first contact
Step 2: Connect to your contact
Step 3: Start talking
By clicking the Digital Crown, you can leave an app and return to the watch face on your Apple Watch
By doing so, the Walkie-Talkie app will remain active in the background, allowing you to receive messages from any of your Friends at any time.
Swipe Up to Know Further Information.