"...customer's existing mobile numbers are no longer tied to a single device..." Does this mean if the customer has an AT&T iPhone (for example) you can receiv

"...customer's existing mobile numbers are no longer tied to a single device..." Does this mean if the customer has an AT&T iPhone (for example) you can receive copies of SMS sent to their handset via the API, or is it still the case that you need a new virtual/tropo number or port your number away from the device?