Hello there...can u please help me on my Phantom 3 advance... i am new in this hobby.. i bought p3a from my friend and i use the latest firmware..after success, i got problem with the range.. i just can fly 300m only.. i try to downgrade but there's no firmware available to be choose in DJI go app.. in 'about' the information of the A/C & R/C was "N/A"...please help me......