“We were just made aware of a vulnerability related to the Walkie-Talkie app on the Apple Watch and have disabled the function as we quickly fix the issue. We apologize to our customers for the inconvenience and will restore the functionality as soon as possible. Although we are not aware of any use of the vulnerability against a customer and specific conditions and sequences of events are required to exploit it, we take the security and privacy of our customers extremely seriously. We concluded that disabling the app was the right course of action as this bug could allow someone to listen through another customer’s iPhone without consent. We apologize again for this issue and the inconvenience.”
Walkie Talkie lets you have a one-on-one conversation with anyone who has a compatible Apple Watch. The app is located on the watch’s home screen. It’s indicated by a yellow icon that looks akin to, well, a walkie- talkie.
Open the app and a list of contacts that have an Apple Watch who you frequently FaceTime or Messages pops up. You can add another contact card by scrolling to the bottom of the list and selecting the "+" symbol. An invite will be sent to the contact who can accept (or note) your Walkie-Talkie friend request.