Hello guys. I'm going to try to enlighten this a bit. Eight friends and I have been playing every week. Nearly we all have to deal with connection problems, most of them 7XX issues.
Our conclusions:
- the problem is not the cache.
- the problem is not the NAT type, we all are NAT 2: firewall with uPNP enabled.
- the problem is not our LAN network. No matter if we have seven devices connected or not. No matter is everything else but the PS3 is off. No matter is we are thorugh wireless or cable.
- The problem is not about the quality of our internet connection. A friend and I used to play together and now we can't. And everything is the same.
- The problem is not the PSNetwork, I use to play other multiplayer games without an issue.
- The problem is not the blutooth mics, we have tried with and without them.
So, we guess the problem comes from the GT5 SERVERS THEMSELVES. No matter what we do. We have tested dozens of possible scenarios.
Most of the times the error message is about an incompatibility between the room owner and yourself (706). So everytime we play we have to go trying different room owners until we find someone who doesn't have problems with the rest. Actually, nearly impossible. When we finally are in one room together, some of us can't listen or see e some other players at the race. And they are in!
We normally spend one hour trying to join and play. This is unbelievable. I hope poliphony or whoever is the responsible for this fixes the problem, as little we can do about it.