It seems many weeks ago my phantom was doing fine and having fun taking many pictures. Then out of thin air my GPS would come and go. I'm suspect that after I did a prom update when things went weird. I have since crashed twice because of a feared fly away. Pilot error. Does DJI offer a diagnostic software or if not. it should be standard option. I believe I should be able to run a system check if we detect something suspicion. All of us phantom owner are doing are own repairs. Now we having to register with FAA, mine is. So, my GPS issue. I also check the GPS antenna, no cracks. Any comments of these items?