Hello, I have had my solo since late 16 and had many great flights with it. I have recently had a problem where it would perform well first flight, but then continuously disconnect after getting 10 feet away from base. I read the forums, and it said to recalibrate my sticks ( as I kept getting the warning that solo was connected but no internet ). I recently bought the alpha antenna upgrade and those are not working at all. It says its connected on the ground but as soon as taking off, it disconnects ( even less range). My phone is a iphone 6 with 10.2 version software, I am afraid to upgrade as I heard that causes even worse issues. I have also flown it with a samsung galaxy A tablet. both have same problem and I have a big shoot coming up.Can you help me?