1. “Unknown number identification” is an online service provided by Xiaomi;​
  2. Whenever an unknown number is used for placing/receiving calls or sending/receiving text messages, this number will be uploaded to Xiaomi servers for identification of the number’s “tag information” (the service guarantees that user’s personal information will not be acquired by a third party, and therefore user’s identity will not be at risk of exposure to a third party as a result of the upload);
  3. The number’s “tag information” is provided by users or network partners. By means of computer analysis Xiaomi will only ensure that:
    （i）“Tag information” is consistent with that uploaded by many users over a certain period of time (i.e. when an unknown number is marked with the tag “reported as fraud by 500 users”, it indicates that a large number of users over a certain period of time identified the number as fraudulent, and shared this information with Xiaomi);
    （ii）“Tag information” is acquired and selected from reliable sources, and the source of the information is revealed to the users. At the same time, Xiaomi provides the users with the options of “correction” and re-tagging in order to get feedback on erroneously tagged numbers.