[onslauth]

They very possibly can do all of the above.

However you have to understand how a lot of the cellular operators function. They don't build much of the systems in house, but buy from large companies like Ericsson, Huawei and so forth. Therefore all their functionality is controlled by those companies.

That being said, the cellular operators don't like to hand out contact information about their customers. All billing is normally done via a MSISDN to a single system that stores a customers credit, and records all billing information. It does not contain any customer details.

I have actually seen a different approach, wherein any messages going to a MSISDN that has been identified as a tablet or modem / dongle, will be redirected to another MSISDN as a SMS or an email address, depending on the customers preferences. All these details were stored in another database.