upgrading firmware

  1. donaldstone

    USB OTG CABLE

    I bought my Phantom 4 used and I did not get the USB Otg cable with it. I am using a Apple iPad Pro 9.7 with my receiver. I am using a lightning to USB Cable with my iPad. what combination of USB OTG Cable and cable to connect between OTG and Receiver do I need to buy for upgrading firmware...