Can Unicom's GSM mobile phone be kept by SMS?

No, Unicom mobile phone users can't apply for telecom short message storage service. You can ask Unicom customer service if there is this service. If so, it can be handled through Unicom customer service.

Telecom "short message storage" service is a comprehensive service that both the calling party and the called party can order. After subscribing to this service, the SMS sent/received by users will be automatically saved in the SMS safe deposit box of users. Users can query the SMS records of the safe deposit box through the self-service website. When the safe deposit box reaches 80% of the set capacity, it will receive an automatic notice from the system. Short message storage service provides point-to-point, point-to-point application and point-to-point message storage service.

SMS storage fee standard:

Processing and unsubscribing methods of SMS storage service;

Personalized setting method of SMS storage service;