So far I have set up the sandbox and can login to the admin portal and also use the Softphone Google extension on Ubuntu Linux.
I tried to call someone from the sandbox, but I can't call to an external number (although I can call in with my personal cell). So I reason that I need a sandbox number to call. Scanning the forums, it seems that I need to Add a User to my sandbox account. So I click Users, then Add User, and set up a new phone number in Quebec. I then choose Softphone for the new user and the setup pretends it is shipping it for $0.00. After submitting, everything looks OK except that I was never asked to enter a name, which I thought odd. But when I go back to the Users menu, the new user is not added. If I click Add User again, it indicates that one user has been used in my sandbox Plan of 4-4 users and only three remain. Therefore it looks to me like the new user has been added but not displaying properly, even if I enable all roles, etc.
I did notice that under Unassigned Extensions, there is one called "Ext. with RingCentral Phone app" (438) 806-7603 Is this the one I am supposed to use to practice calling out? Is it intentional by design that the sandbox cannot add users? The Softphone won't let me call out on that either... it says: "Your extension is not allowed to make outbound calls with browser currently." Thank you for the help and advice.