Even on the latest firmware, the KD-43X8309C exhibits hardware limitations typical of early Android TVs:
If your TV is connected to a Wi-Fi or hotspot network, follow these steps to check for and install updates: Open Settings : Press the button on your remote, then navigate to the icon (gear icon) at the top right. Navigate to Update System Settings System Software Update Check for Updates Software Update Check for Updates Firmware Change Update on SONY KD-43X8309C
Newer firmware versions reduced input lag specifically for 4K HDR gaming. Even on the latest firmware, the KD-43X8309C exhibits
October 26, 2023 To: Technical Support / End User From: Technical Assistance Model: Sony KD-43X309C (Android TV 4K Ultra HD) Even on the latest firmware