Freaking cold here,took my mambo out without camera and i get aprox 40 m range,went into settings ,did flat trim and then killed app,took off and without using my phone with app i ended up flying aprox 60m and had to stop due all the trees and strong wind...when not using phone i get more range (and camera is useless)....more range when phone is not in use,less range when in use but able to use camera....i think range is affected by firmware