That's an interesting issue. I use GS for iPad which I find suits me well for its portability and ease of setting up but I struggle with the Bluetooth units reliability. Anyway, that aside I have decided to try a different antenna on the ground end to see if this makes a difference to the reliability of the signal received and as such I have just had a 2.4ghz patch antenna arrive from Hobbyking which I'm going to try. Only problem is that I brought a SMA fitted antenna when I should have purchased the RP variant. I've run out of adaptors. On one recent GS flight I went out to a large open lagoon near my home and flew the P2 for over 2km with full reception back on my GS app which was amazing. I think that the 2.4 frequency used is very sensitive to RFI regardless of any other issues. A friend of mine is an electronics engineer who is pretty certain he can upgrade the antenna on the air end to greatly improve the reception so if anything develops there I'll let you know.