Launch the GameSir App (ensure you are using version 5.3.24 or later).
Hold down the L3 button (press the left thumbstick down) and plug the USB cable into your PC while still holding it. Gamesir T4 Pro Update Firmware
Tap on your device in the app. If a firmware update is available, a red dot or notification will appear next to the "Firmware Upgrade" option. Launch the GameSir App (ensure you are using version 5
Once the progress bar finishes, your controller is updated. This specifically resolves the gyroscope lag often found in older versions. Method 2: Update via Mobile App Gamesir T4 Pro Update Firmware