I bought my P3S in october 2015 and everything was ok. After two months of flying I made a long winter break. When I resumed flying in the end of march I found that the range of my drone dramatically decreased to 50 meters. The behavior of the signal is very strange. Video link is always stable and full. But the RC link changes from full 5 bars to signal lost in 2 seconds. Sometimes it restores in 10 seconds, but sometimes it restores only in 20 meters. Drone can hoover in 30 meters from RC and the signal changes from 5 bars to signal lost. I opened the cover of my RC to check the antenna cable and I'm sure that it is not broken. I tried to fly far away from city to minimize the interferences but the result was the same. My P3S never had a crash. What I tried to do: 1). Relink my RC about 20 times - nothing changed. 2). Upgrade and downgrade (when it was possible) the firmware using DJI GO app - nothing changed. 3). Upgrade and downgrade DJI GO app. I found a guy who have the same problem. We tried to relink our RC to each other drones but the problem still remains. In our local service I was told that only antenna boost can solve my problem. But I was satisfied with the range of standard antenna and only want to restore it back.