1. Try shutting down and restarting.
2. Back up S-health data and reset S-health (open S-health-click three points in the upper right corner (menu button)-Settings-reset data). It is recommended to back up health data before resetting.
3. If it is invalid, please back up the information (contacts, text messages, photos, etc.). ) and try to restore the factory settings (Settings-Reset-Restore Factory Settings).
4. If the problem still exists, it is suggested that you take the purchase invoice, maintenance card and equipment to the local Samsung service center for professional engineers to help you test.