Hi, I am not the only one, sure some of you will welcome me in the Phantom 3 Pro bathers... I should have train to non-GPS fly somewhere else than the river, but hey, lesson learnt. It hit the bank, stopped (I think this is fortunate for the electronics), then fell in the water, it has not been completely submerged. It stayed in the water for 7 to 10 seconds, battery was barely wet (I took it off instantly, the other side of the Phantom was inside the water fortunately). Did a extensive clean and dry, the only issue for now is condensation on the camera, I removed the back to let it dry. I decided, before my test flight to upgrade to latest firmware, I have the latest on remote and device. And no GPS signal now... And I haven't tested outside before the upgrade... Issue is then I have no clue if it is water damage or firmware issue. I struggled to do the firmware update on the device, it was loudly beeping, had to change SD and try to upgrade a couple of times. But finally done. I took it for a non GPS test flight, with the same battery. All good so far. Apart from GPS. What step do you suggest to do to know if it's a software issue or hardware issue? I was thinking about downgrading the firmware just to check but now clue how to do this. Thxs for your help. V.