Hi, I had my OSMO for a few days and I experience a problem with the gimbal. It starts to vibrate/rattle at som angles, it is easy to reproduce in some orientations (like 15 deg left from vertical in landscape or 15 deg below horizontal in portrait). This only happens when I’m trying to hold it still, like when taking photos. It’s like the gimbal is overcompensating or can't find a correct position. If I keep the unit in this position the vibration increases and you can start to hear it as well. I can some times place the grip on a flat surface, standing up, and trigger this. Then the Osmo is “dancing” around and you can clearly hear it. When moving around I see nothing of this, like when taking a video. To me this seems to be a software problem in the gimbals control system. I’m on the latest firmware. I have calibrated several times and balanced the phone. I’m using the DJI Go app with iPhone 6s. This happens also without any app running on the phone, even with the phone powered off. Is this a known issue? Is there a better firmware?

I don't experience vibrations in Torch-mode/orientation.

I also noticed that if I add an extra hand and apply a very firm grip the vibration stops, when I release the extra hand vibration starts.

I'm not known for a weak handshake and believe a regular firm one-hand grip should be enough to hold the gimbal.
I should not need to focus on applying extra force to my grip, that can only last for short while.

Is your rear thumbscrew loose?
Check this thread on the forums: https://forum.dji.com/thread-175109-1-1.html