Hi,
I tried downgrading to 602 and after that updating again to 700 but still it's like it has a virus inside that won't come out. I I also refreshed the firmware with another battery but the result was the same.

How can I fix it all? Please help. I really need my drone working again.

Did you perform anIMU calibration after the update?  Mine had a similar prob and that fixed mine.

Hi, yes I compass and imu. But still the Phantom is not stable. It has sudden movements repeatedly.

Moshe.mmm Posted at 2018-5-13 10:59
Hi, yes I compass and imu. But still the Phantom is not stable. It has sudden movements repeatedly.

When you did the IMU calibration, was it on a level surface (check with spirit level) ?

There is also a small possibility that a sensor calibration might help. When the aircraft is at 10 metres or below the VPS and ultrasonic sensors help hold position. It would be worth doing the sensor calibration using DJI Assistant 2.

Thanks friend. I would try that.
If it wouldn't work, maybe not all the file of the update passed through correctly?
I remember I heard it somewhere here. Do you know if this could be it?

Moshe.mmm Posted at 2018-5-13 13:58
Thanks friend. I would try that.
If it wouldn't work, maybe not all the file of the update passed through correctly?
I remember I heard it somewhere here. Do you know if this could be it?

It is possible I suppose that there may be a corrupted file, or one which has not been updated during the process. A firmware refresh for the aircraft could be done while in Assistant 2.