I have three P4P V2.0‘s and fly telecom with them. I’m having some wacky things happening on two of the drones. I’ll spare those details. I downgraded drone firmware on all three from 01.00.52.00 to 50.00 using Assistant 2. Is there a way to also downgrade the GL300L standard controller firmware as well? I’d like to start fresh with previous firmware versions in all hardware.

Hi there. Thank you for reaching out. The firmware of the DJI Phantom 4 Pro V2.0 aircraft can be downgraded using the DJI Assistant 2 software once the firmware version is available on the list. Since the remote controller of the DJI Phantom 4 series cannot be connected to the DJI Assistant 2, there is no option to downgrade the firmware of the RC using the said software. Hope this helps. Thank you for your understanding.