I like to forward this because it's important for some people.
If you don't want to modify your drone forget this and keep updating you are used to do for the best of your DJI product.



Warning,
DJI seems to have released some firmware versions which have a higher antirollback value than others.
Air2:
01.01.0610 (firmware good for hacking) - Antirollback 2
01.01.665 (firmware cannot be hacked, neither downgraded or upgraded) - Antirollback 3
01.01.670 (firmware cannot be hacked, but it can be flashed to 610) - Antirollback 2
Air2s:
02.04.2040 (firmware good for hacking) - Antirollback 1
02.04.2075 (firmware cannot be hacked, neither downgraded or upgraded) - Antirollback 2
02.04.2080 (firmware cannot be hacked, but it can be flashed to 610) - Antirollback 1
FPV:
01.02.0000 (firmware good for hacking) - Antirollback 1
01.02.0015 (firmware cannot be hacked, neither downgraded or upgraded) - Antirollback 2
01.02.0020 (firmware cannot be hacked, but it can be flashed to 610) - Antirollback 1
As far as i saw this firmware versions are not public available but some people have them (not sure how, my current assumption is that they were flashed after service, but this is only a guess).
So please warn everyone now to install this firmware version, best would be not to update at all.
Also this again shows that we should change our way of speaking about firmware versions, the version numbering is completely unimportant, the only important fact is the antirollback value.
How does this value work?
The drone has the antirollback value of the current firmware, this value can NEVER be decreased, it can only stay the same or increase! So when you want to flash a firmware the drone cannot flash it if the antirolback value of the firmware you want to flash is lower than the current value on the drone. the firmware you want to flash must have the same or a higher value. If you flash a firmware with a higher value the drone will automatically set itself to the higher value, from now on only versions with the same higher value can be flashed. Due to this the air2 cannot flash firmware 670 on top of firmware 665, because 670 firmware has a LOWER value than 665.
i hope i was able to explain this now properly and i hope people will understand the importance of this value now.
All drones with the firmwares 665, 2075 and 0015 cannot be hacked anymore and can not be flashed to a hackable firmware. IF or WHEN they will be able to be hacked again is unsure.
Please spead this information in every channel and community you are part of! Warn everybody to NOT UPDATE!
thank you for your attention!

Thanks for sharing.

Interesting and thanks for sharing.  

does anyone know how to downgrade from 01.01.920 anit roll back 6

jozef88 Posted at 10-6 15:11
does anyone know how to downgrade from 01.01.920 anit roll back 6

Hi. Did you downgraded your firmware? I have the same problem

Some this doesn't really clarify what an antirollback # means,  my understanding is that the lower #s can't roll backwards (or downgrade firmware)  ,  but higher #s can ,   Like antirollback 6 can't  rollbackon inspire 2 from 1.02.0500,  but on 1.02.0600 I was able to downgrade back to 0500 and both are antirollback 6   so what the heck does the # even mean?

Roety Posted at 3-25 08:34
Some this doesn't really clarify what an antirollback # means,  my understanding is that the lower #s can't roll backwards (or downgrade firmware)  ,  but higher #s can ,   Like antirollback 6 can't  rollbackon inspire 2 from 1.02.0500,  but on 1.02.0600 I was able to downgrade back to 0500 and both are antirollback 6   so what the heck does the # even mean?

Hi there. The previous firmware versions will be removed from the server based on conditions. The firmware cannot be downgraded to a removed version. Any firmware that can be obtained from DJI Assistant 2 is available for usage. Have a nice day.