Can Unicom check the phone records and SMS records?

Unicom number can check the call records (calling and called records) and short message records (sending and receiving records of short messages) in the past six months, but the short message records can't find the specific short message content.

Inquiry method: China Unicom APP—- Service-Inquiry-Telephone Fee/Details Inquiry-Call Details/Internet Traffic Details/SMS/MMS Details/Value-added Services Details.