Currently, verification code text messages sent from websites like Google do not come through the RingCentral SMS service. Therefore I am unable to add my RingCentral number as the primary number for Google to use for notifications, which impacts our business negatively.
I just found out about this limitation as well, and am very unhappy about it. It's not just services like Google that are unable to send SMS to our RingCentral number. We have several clients who use online SMS service applications that do NOT work when trying to send to RingCentral. The worst part is, there is no message back to the customer that the text failed. It just never goes through. So they think we are ignoring them!
This is a big hole in the SMS service for RC and needs to be resolved.