I dont see Walkie-Talkie in my watch seri 3 - ios 5

If you don't see the Walkie-Talkie app

1. Download the FaceTime app on your iPhone. Open the App Store on your iPhone, search for FaceTime, then tap . 
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.

FaceTime is not available in all countries or regions.

https://support.apple.com/en-us/HT208917