Probably. But the whole thing is, I don't want every service to use my mobile number to track me as I register for my grocery card frequent customer (10 cents of lettuce), I want that to be anonymous. Instead it's not, they must be centralizing that. I want something like a virtual sms provider on my phone that (1) protects my privacy (ha), (2) hands out virtual sms numbers for services. It knows that at say costco I'm sms number 1234, and at safeway I'm sms number 456. I use the app on my phone to manage this. Another user on this service gets a different number at safeway than I do (but it's unique for them). Because there aren't an infinite number of these, the numbers the service has get randomly shared among the users. So someone else would eventually get 456 for a service that use, but it's not "me".