For general feature updates and button mapping adjustments, use the GameSir App on Android or iOS.
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
Visit the official GameSir T4 Pro Tutorial page and download the latest .exe firmware update file (the latest major update was V1.45 ). Enter Update Mode: Ensure the controller is powered off . For general feature updates and button mapping adjustments,
If the firmware becomes unstable, use a thin pin to press the Reset button located in the small hole on the back of the controller to reboot it. Tutorial: How to use GameSir T4 Pro Enter Update Mode: Ensure the controller is powered off
Ensure you have "forgotten" the device in your phone's Bluetooth settings before trying to reconnect through the app.
Launch the GameSir App (ensure you are using version 5.3.24 or later).