Step by Step Downgrade from v1.9.20 to v1.5.70 | DJI FORUM
DJI Support - Firmware update for Phantom 3 Standard (v1.9.20) & Phantom 3 4k ( v1.6.50): #Phantom3 #Firmware What's New 1. Updated No-Fly Zone Management. 2. For increased safety, the flight is
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