So I was browsing through Fongo's support articles, and I came across a test number I didn't recognize mentioned in a few:
😎226 336 1437 😎
It appears across a few of their pages:
I'm happy there's a Canadian number providing "this!" It may be a new occasional blocked/declined conditional call forwarding destination for me. 🤣
Fongo also operates an echo test with a memorable number: 226-244-4444 - Documented here: https://www.fongo.com/improve-your-audio-quality-mobile/
Here's a picture of this handsome heartthrob y'all can add to your phonebook entries to assist when quickly trying to Rick roll your friends. 😂🤢
PS: Looks like Fongo has since changed the number shown as an example on their contact form to their regular customer service number instead of Rick. They continue to suggest it on the other two pages I noted in the OP though!