It should only be a few minutes, at least thats my experience from other products.
Though i never update via APP as i dont like touching my phone so i prefer to use the file on memory card approach to updating firmware.
Done that mate and it finally came back to life. Reset to default etc fo start again.
Go to use it this morning and the rear view camera won't show up on the screen and it just froze again! Half tempted to take it back after work it's naff. My 312gw was fine but this one is a pita.
Im using a 64gb sd out of my gopro, could that be an issue?
Has anyone got the appropriate download file Before the latest update for the 422gw? As the blue led is constantly flickering but before I updated it was operating fine. So I would like to revert back if possible