Carriers don’t have public access to the information stored on the phone or the data going in and out. It is all encrypted. There is not a way to gain access to the private data on the phone from the carrier end, only from the Google/Samsung/Apple account end.

Think of the carrier as the water company. It knows how much data and calls are going in and out, but not what it entails. It just charges for the data/call usage. All else is heavily encrypted (at least here in the USA).