Can I retrieve the information of 10 years or more in Unicom?

I can't. In China Unicom, you can find the call records and short messages six months ago, but the call records and short messages more than 10 years ago have expired, which are not within the record range of China Unicom Information Desk, and China Unicom Information Desk cannot query the call records and information more than 10 years ago. Call record and short message record are query services provided by China Unicom for the convenience of users to query the information of call list. Users can visit the local Unicom business hall and Unicom official website with their mobile phone verification code or ID card.