DJI - Phantom 3 Tutorials-Updating The Firmware - YouTube
Phantom 3 & Remote Control Firmware Update Tutorial - YouTube
Step by Step Downgrade from v1.9.20 to v1.5.70 | DJI FORUM
DJI Support - New remote controller firmware for Phantom 3 Professional, Phantom 3 Advanced, Inspire 1 series and M100 Remote controller firmware v1.4.30 is now available for upgrade. To upgrade, launch the
Firmware update DJI Smart Controller - no support Phantom 4 Pro V2.0
DJI Phantom 3 firmware update Full Process - YouTube