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
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. Gamesir T4 Pro Update Firmware
Launch the GameSir App (ensure you are using version 5.3.24 or later). Once the progress bar finishes, your controller is updated
Ensure you have "forgotten" the device in your phone's Bluetooth settings before trying to reconnect through the app. Once the progress bar finishes