hi, after a week of non-flying i took the baby outside and fly a little round. then after a dist. of ~100m/330ft and an altitude of ~75m/250ft the msg "control signal lost" appears on my iphone screen it goes off again.... comes back in a few seconds, same for 4-5 times, then the copter goes "going home" mode. flying mode is phantom i checked the rc: - checked the orientation of the antenna, was in 90° position to copter (the long side...) - fcc mode, beep twice .... seems ok - batteries 1-4 > 1.3 volt.... seems ok - open the rc for the atenna cable..... no damage/connector still plugged in ..... seems ok - uses the same iphone 5 with gsm on. mobil radio was not a problem before... so... seems ok before that, i reached on open field a range > 3000 feet dist. with 430ft altitude, only the wifi drops out, not the control signal. i use this setup: -> viewtopic.php?f=7&t=3880&p=55706#p55706 all was fine. and now that... i dont have a clue, wtf this is... do anyone maybe have an idea?