I made the mistake of upgrading to 1.5 thinking I could just rollback to any firmware I wanted. Boy was I wrong! I could only downgrade to 1.4 only.
Note that the damage has been done, am I still relatively safe from future restriction if they are imposed? Meaning if in the future DJI imposed restrictions (either through firmware or GO app), I can stay right where I am currently, right? I have all GO app apks just in case...
You are still safe. I am using FW v. 1.4.10 and I am still getting no altitude restriction, and all 32 channels of videos transmission. I am getting them through Litchi, however, not from DJI Go.
If you want to use Litchi, you will have to use version 2.3.1. If you buy the app and email the developer directly and ask him for this earlier version, he will most likely send it to you if you explain why you need it.
If DJI Go has already updated itself, you will need to uninstall it. Then reinstall an earlier version.
To be completely safe from getting auto upgrades and updates to the Firmware (If you don't want it), you can do what I have done. If you set up your system the way mine is, you can have a stable, functional system without the restrictions.
Step 1.
Uninstall DJI Go.
Step 2.
Install an earlier version. (I went all the way back to DJI Pilot v. 1.0.7. That way, I am sure it won't auto update itself, and will never complain about the FW being out of date.)
Step 3.
Buy Litchi, and contact the developer (direct by email, not in the forum) and request version 2.3.1
Step 4.
Go to Google Play, and in the settings, turn off auto updtae
Step 5.
Download an firewall app from Google apps that will allow you to block certain apps from accessing the internet. There are many to choose from.
Step 6.
Block DJI Pilot and Litchi from accessing the internet just as a precaution so they don't update themselves.
Step 7.
Back up all your FW bin files and APKs.
Step 8.
If not already there, update the FW on the copter to 1.4.10 so it matches the RC. (If your flying fine and nothing complains, this is optional)
These instructions are for an android tablet. Litchi is only now coming out for iOS and it will be the version after the restrictions are in.
If you have iOS, Do whatever you can to stay where you are and block all related apps from accessing the internet. If you are just using DJI Go, you have already lost the altitude and video channels and can only hope to avoid further restrictions.
I have laid out these instructions, not because I recommend that everyone do it, but to help TC Malker because he wrote that he wants to stay back to the earlier versions before the restrictions were implemented.