Adam Schiff uses a dark blackberry, with military grade encryption. IOW, there are no records.
Do they still make blackberries?
Wrong. There are always call records. If you call a number from one phone to another, a CDR (call detail record) is cut. This will show, at the very least, the calling number, the called number, time of call, and duration. It will show the content of the call, but the metadata involved is still extraordinarily useful for intelligence services.