Thank you.Right out of the manual
Aircraft automatically descends and lands if RTH is triggered when the
aircraft flies within a 20 meters (65 feet) radius of the Home Point. Aircraft
will stop ascending and immediately return to the Home Point if you move
the throttle stick if the aircraft reaches 20 meters (65 feet) altitudes or
beyond during Failsafe.
Sent from my VS987 using PhantomPilots mobile app
Got it fixed. But he is getting message Strong InterfearenceProbably a good idea for him to download and read the full manual from here Phantom 3 Standard - Specs, FAQ, manual, video tutorials and DJI GO - DJI