Open Baidu search, enter "Xiaomi" in the search bar, find Xiaomi official website after the search, and then click Enter. Find "self-help" after entering, and then click the "self-help" button to enter. After entering the self-service interface, find "Query Authenticity" and click Enter. After entering, enter the corresponding information according to the system requirements. After verification, you can know the activation date of Xiaomi 8 mobile phone.
In addition, you can consult customer service, or the official after-sales check, where they can find the activation time and usage.