new firmware 1.9.2 has messed up my phantom 3 standard.

[ImACarbonCopy]

new firmware 1.9.2 has messed up my phantom 3 standard.
I want to revert it back to factory specs where it worked just fine. I have found the software. Just don't know what to do with it.
I updated to new firmware.
Now my drones camera wont tilt all the way down. it goes down to around 30 degrees.
Gimbal has full range at startup and when I calibrated it.
Also the drone when lowering straight down motors are slightly pulsating making the drone rock back and forth and side to side,
The drone never had these problems before.
drone is performing like this using DJIGO and LITCHI
and with LITCHI im now losing video signal just a few meters away. never had that problem before either. Anything I can do to trouble check these problems?

 

[ImACarbonCopy]

uninstalled the GJI GO app and Installed the app call DJI GO for products before P4
The pulsating seems to have gone away.
The gimbal is binding worse now even at startup

 

[HermannG]

Hi
Try the IMU calibration and for video downlink use something like Ikarus (I use it, you have to pay for it and I think is available only for Android) or the free version, I think is called Magic Power. Both will increase your video downlink but 5.8 Ghz (controller input) will stay the same. If IMU calibration do not work try re installing the firmware