Hi. My P4 is about 2 months old now. Ever since I've purchased it I have received interference on the mobile device display. This is usually green or purple horizontal bars that take a 20% of the screen. I've checked that I'm using the current software do both the drone and the control. If I select a manual channel I do not experience the same issue, but appear to have a reduced range. I have receive the same problem when using the following mobile devices: Samsung S5 Samsung Tab A HTC M8 Any ideas guys?