If you are determined to find a fan-edit:
Official 4K Blu-rays have a bitrate of 80-120 Mbps. Fan-made Open Matte rips often come from streaming sources or upscaled HDTV rips, resulting in: dune imax ratio download
You cannot watch IMAX Enhanced on an iPhone. You need: If you are determined to find a fan-edit:
Before venturing into the grey waters of file-sharing, know where the IMAX ratio is legally available: dune imax ratio download
Currently, there is no official "IMAX Enhanced" download or Blu-ray release for Dune: Part Two that includes the expanded aspect ratios.