I have been having major break up, freezes, total green screen, black screen and general break up on my P4P. It has been returned to service 4 times, replaced twice and I even go a new iOs. The service manager in California says they ran it for over an hour on all different devices and find no problem and haven't seen my issues. Any ideas??? Could this be a wi-fi issue with frequencies... I'm stumped and fed up at this point but what alternative do we have for under $3000 dollars. I'm licensed and have been flying for 4 years now, never had this problem and now can't get rid of it, HELP