If you wish to port voice and SMS capabilities separately to have more control over the change process, you can do so. For example, if you wish to only port voice capabilities first, you can use Zoom Phone for voice, while the same phone numbers use SMS with your current provider. Once you are ready, you can also port the SMS capabilities to Zoom Phone.
Learn more about opting out of Zoom Phone SMS.
Learn more about opting out of Zoom Phone SMS.