The data usage is always reset to 0 MB on the LG device on the set reset day of the usage cycle. In addition to changing the reset day, the data usage, i.e. the statistics, can also be manually reset or deleted.

Android 9 | LG UX 9.0
Reset Data usage -  Open the  Settings
Reset Data usage -  Tap on  Mobile data
Reset Data usage -  Open the  Menu
Reset Data usage -  Tap on  Reset data usage
Reset Data usage -  Confirm with  Yes
  1. Open the Settings
  2. Tap on Mobile data
  3. Open the Menu
  4. Tap on Reset data usage
  5. Confirm with Yes

LG Instructions
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