In Phantom 3 Release note:
https://dl.djicdn.com/downloads/phantom_3/en/Phantom_3_Professional_Release_Note_en_20160613.pdf
Firmware update that touches the compass is this one:
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2016.3.15 Overview: 1. All-in-One firmware version updated to:v1.7.0060 2. DJI GO app iOS version updated to: v2.7.0 3. DJI GO app Android version updated to: v2.7.1
What’s New: 1. Improved compass accuracy.
2. Fixed issue of image being corrupted in rare occasion.
Notes: The firmware can be downgraded to v1.6.0040.
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Can the latest firmware be downgraded, does anyone know?
Think you can only go back one version, that rules most of us out.
Now the release notes say they improve compass accuracy... was there any evidence that it was not accurate before this?
Funny that the compass "fix" came on March 15... same day P4 was released. Sounds fishy.