I have been on the WhatsApp channel for two days and got most of my answers within an hour! I don't know how to invite people or get the link, but? I got it from a scan from my dealer on eBay, fineshop. Here is what I scanned it from, I don't know if it will show here as it's an image:

I'll bet that is the original What's App Q900 site!
--
Bob, KL7EAL Los Angeles