I newly installed VM+ app but cannot properly connect my primary Verizon wireless phone number.
The following screen shot is what I expected at initial set up in order for a device to be connected to a specific phone number.
(I used my NEXUS 9 tablet)

However this screen didn't come when I tried to do exactly same thing on my NEXUS 5X.
(No error message, just skip it to go conversation page.)
Therefore I could not connect my NEXUS 5X to my primary Verizon phone number.
Why?