Comment by chatmasta

I'd also like to know what "based in the EEA" means:

> For interoperability to work, both you and your WhatsApp contacts need to be based in the EEA.

Does my contact phone number need to have an EEA country code? Does my current IP address need to be geolocated in the EEA? Do I need to download the two apps from a regional App Store in the EEA? Do I need to show an EEA payment method to both apps? What happens to my chats if I move or switch app stores?