Walkie talkie

Hi emilija195,

Welcome to the Apple Community.

Re: it wasn’t working

Seems Walkie-Talkie is not available in all regions.

(If others you know in your region are using it ok, then that shouldn't be a problem.)

_________________________________________________

Re: decided to delete the app and reinstall it

To reinstall walkie-talkie:

Seems you have to use your iPhone:

1. FaceTime is required for Walkie-Talkie to work, so if you've deleted it, re-download FaceTime on your iPhone. Open the App Store on your iPhone, search for FaceTime, then tap the download button . 
2. Make sure that FaceTime is turned on. Open the Settings app, tap FaceTime, then turn on FaceTime.
3. Open the FaceTime app. To make sure FaceTime is set up correctly, try making a call. 
4. Restart your Apple Watch.
5. Restart your iPhone.

If you have FaceTime on your iPhone and don't see the Walkie-Talkie app on your watch, you might have deleted it. Open the App Store on your Apple Watch and re-download it.

FaceTime is not available in all countries or regions.

Above is from the complete article: Use Walkie-Talkie on your Apple Watch - Apple Support

________________________________________________________

More info. on how to Use Walkie-Talkie on Apple Watch – Apple Support)

All the best :-)