To check for and install system updates on your Samsung Galaxy S23 Plus, follow these steps:

1. *Open Settings:*
- Swipe down from the top of the screen to open the notification panel, then tap the gear icon to open Settings.

2. *Navigate to Software Update:*
- Scroll down and tap on "Software update."

3. *Check for Updates:*
- Tap "Download and install." Your device will check for any available updates.

4. *Install the Update:*
- If an update is available, follow the on-screen instructions to download and install it. Your device may need to restart to complete the update process.

Ensure your device is connected to Wi-Fi and has sufficient battery life or is plugged into a charger before starting the update.