Thread: About 37xx converted to 34xx satellites reception accuracy

Because I have the same accuracy problem like some of other forum users, I have marked this Thread for reading. Unfortunately I was quite busy these days traveling with GPS /3790->3490/ so have no chance to read the whole thread. But believe me, during weekend I become mad because of poor satellite reception.
I have tried many things to improve accuracy like hard reset, clear nonvol, changing software version and so on. Accidentally did also just what Caty did and described in [Only registered and activated users can see links. ]. The result was brilliant and I thought that I have solved the problem, but the miracle with good and immediate GPS accuracy disappears in my case within 20 min. And after 20 min the same old bad accuracy appears again and again.
I want also to mention that I have no directory named rxn.
Can someone share it in order to try what will happen? Copy/paste might work for me.... or most probably not ....