can series 1 apple watch use walkie talkie?
To use Walkie-Talkie, you and your friend both need to have an Apple Watch Series 1 or later with watchOS 5.3 or later. You also both need to set up the FaceTime app on your iPhone with iOS 12.4 and be able to make and receive FaceTime audio calls. The Walkie-Talkie app isn't available in all countries or regions.