I have a P3P and I use an Ipad Air2 as the tablet for it. When flying today I wanted to try to change the RTH from the original take off position to that of the tablet, I believe it is called the Dynamic Home Point feature. When I touched the button to change, I got a message that said the GPS signal in my device was "too weak" to allow re-designation of the home point. Not exact words, but words to that effect. I was just wondering if anyone else has had this happen, and if there is any remedy for it. Thanks.