After being updated to Android 9.0 Pie, the Galaxy S9 and S9+ on Verizon and Sprint receiving their first update update that comes with the latest security improvements and few bug fixes to these devices.
This latest update for Galaxy S9 devices brings February 2019 security patch that provides providing fixes to 12 Samsung Vulnerabilities and Exposures. Also, the update installs bug fixes and stability improvements.
This update for Galaxy S9 and S9+ is rolling out as software version G960USQS3CSAG and G965USQS3CSAG respectively. If you want to check this update, please head into Setting > Software Update > Download and Install.