: Sign in with the primary Google account used on the Xiaomi phone. Select Device : Click on your Xiaomi device from the list.
The report will often show the activation date and the date the phone rolled off the assembly line.
For the most reliable results, start with the method, then move to the Official Xiaomi Website if needed. The website method is the gold standard for accuracy, as it queries Xiaomi's central database directly. When all else fails, Xiaomi customer support is always available to help.