If they have a clinical visit and they leave their primary mobile phone that is the same as the phone that received the SMS to the NHI system, because the insurance pays for that visit, then conceivably you can link that through the database.
If they have a clinical visit and they leave their primary mobile phone that is the same as the phone that received the SMS to the NHI system, because the insurance pays for that visit, then conceivably you can link that through the database.