Hi, Just bought my Phantom 3 standard and was trying to update it's firmware to the latest version via the DJI GO app. I downloaded the firmware and it was applying. It got stuck at 62% before the gimbal started moving up and down crazily. It said on my phone that the firmware update failed and now the phantom has started a playing a loud beeping sound every 2 seconds. I've tried plugging the battrery out and plugging it back in again but to no avail. How can I stop this incessant sound and update the firmware so I can get to flying?