Yes. You'll need a high end phone that can cope with the GoPro's 4K resolution with 100 Mbit/s bitrate (which can be turned down to 60 Mbit/s). No extra configuration needed. It will work as usual, if the phone hardware supports the video.
It's renders with original resolution. You'll need to switch to 4K before recording. If you're using the built-in camera, there's a configuration box in the recording screen, that allow you to switch to 4K.
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