Today I got a phantom 4 from a buddy works great on Android, I use apple I get messages to update the aircraft firmware using otg cable to aircraft from cellphone. I don’t have a otg cable . I tried to use DJI assistant and I find my software and the new updated software I can down load it it finishes at 100% then transmitting stays at 0% longer than 30m . Can anyone shed some light to this ? On Android there’s zero errors on I phone I have gimbal error signal loss error camera goes out .

Appreciate any help I ordered a otg from Amazon all ready anything else I can do ?

0x2800020 Is the error