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: Ensure the controller is powered OFF . Enter Update Mode :
You can also manage updates through the GameSir World app, which has been merged into a single GameSir App Install the App : Download the GameSir App from the Google Play Store or Apple App Store. Connect via Bluetooth Gamesir T4 Pro Update Firmware
: If the controller becomes unresponsive after an update, stick a thin pin into the Reset hole on the back to reboot it. : Ensure the controller is powered OFF
Tap "Update" and keep the controller near your phone until the process reaches 100%. Troubleshooting Common Issues Gamesir T4 Pro Update Firmware
Launch the GameSir App (ensure you are using version 5.3.24 or later).