Can the mobile phone business halls of China Mobile and China Unicom find all the written records of sending and receiving short messages?

All operators can't inquire about the content of the short message, but they can only inquire about the detailed list through the online business hall or the local business hall, but the detailed list can only show the number of sending the short message (receiving may only show the number outside the network, but not the number inside the network), and the sending time can't be inquired about anything else, only the first few months.