Without going through 46 different posts, let me see if I can clarify somethings since I was tagged.
OP asked about wifi and it seems this turned into a few different threads.
1) As others have mentioned, you do not need wifi to fly. There is some discussions (not just here) about the apps (Fly only I believe) logging folks out of their accounts, meaning if you are in a wifi and cellular denied area, and you're logged out, you have an issue. I have not experienced this, and if it is happening, it's very isolated. But I did reach out to one of my DJI contacts to check on this. I'll post when I here back. Unless she's in China, she'll likely get back to me this morning.
2) RID is required for ALL drones that are registered. Obviously any drone flown under 107 requires RID. And any drone flown under 44809, and is over 250 grams, also requires RID since they require registration. If you have a
Mini 3 or
Mini 4 Pro, and use the smaller batteries, you are NOT RID compliant. So if it's registered, it must have RID. Even if you're flying under 44809. If it's registered, and you want to fly under 44809 and w/o RID, technically you must remove it from your dashboards in the Drone Zone to be compliant. Yes, I know that's stupid, but that's the way it is. Will anyone care? Very unlikely, I'm just telling y'all what the rules are.
3) Registration: Anyone can register a drone under 14CFR 107. You do not need to be a Remote Pilot to have a 107 dashboard on the Drone Zone. Same with manned aircraft.
4) Yes, if you have your 107, and want to fly under 44809, you must have TRUST. I'm not sure if this is part of the thread or not, I'm just hopefully cutting that inevitable part of these discussions off at the pass. But you need TRUST only if you're planning on flying under 107. It's rare that would happen, but here are a couple of scenarios where TRUST is required. First, if you want to fly your <250g drone recreationally and w/o RID. In that case it is a 44809 flight since in order to be a 107 flight, the drone must be registered under 107. Second, it's the same case if you want to fly your buddy's new drone that is registered under 44809. Same reason as above.
The main reason I suggest everyone get their TRUST is that if someone comes up to you and asks about flying drones under 107, you'll be able to discuss TRUST with them from a position of authority since you took the test.
I think that covers most, if not all, of the questions in this thread. If not, ask below and I'll try and answer them.