To update the firmware of your GameSir T4 Pro, you generally use the GameSir World app for mobile-based updates or a dedicated firmware tool for PC. Update Methods Via Mobile App (iOS/Android):
[HELP] T4 Nova Pro Hard-Bricked after Bluetooth Update Failure Gamesir T4 Pro Update Firmware
Reset: If the controller becomes unresponsive, use a pin to press the Reset button located in a small hole on the back. To update the firmware of your GameSir T4
For mobile users, the GameSir App (formerly GameSir World) allows for firmware management on the go. Gamesir T4 Pro Update Firmware