Drain the battery completely. This means using your device until it powers down by its own and the battery level reads 0%. Charge the phone until it reaches 100%. Be sure to use original charging To do this, head to Settings > System > Reset Options > Reset Wi-Fi, Mobile, & Bluetooth > Reset Settings. Enter your PIN or passcode, then tap Next > Reset Settings to confirm. Keep in If you have the OnePlus 7 Pro shutdown problem, simply hold down the power button and the volume up button at the same time for 10 to 15 seconds. t4ac.