While your phone maintains a proxy of the footage on your GNARBOX, the GNARBOX hosts the full resolution version. When you make edits, they will be executed on the file on the GNARBOX. Once you decide to share, the GNARBOX will directly share via WiFi or your phone's 3G/4G.
It will not default to sharing through your phone's 3G/4G and will ask you to identify a source upon sharing.
If you first save to your Phone's Camera Roll it will automatically downgrade the max quality your phone allows. That's why we built the GNARBOX in the first place - because we believe that if you shoot in 4K, you should be able to share in 4K.
If you have no service or are in airplane mode, you can still submit a share and log it into the Share Queue. Once returning to service and turned on, the GNARBOX will begin sharing your files immediately!