I purchased a Phantom 4 pro and would like to register the drone with DJI

You do that through the DJI Go 4 app.  It will prompt you before you can do anything else.

if it brand new you do it via the app... if its used you cant register it as the original owner did that and cant undo it

Andy, a brand new drone should be activated first. I'll attach the tutorial video for your reference.

DJI Susan Posted at 2018-1-19 01:34
Andy, a brand new drone should be activated first. I'll attach the tutorial video for your reference.

https://youtu.be/0kvSFW9rPb8

Thanks Susan.

The Phantom 4 Pro was not new, but from someone that purchase it and then found out it was not something he was interested in moving forward with.

Phantom Pilot ( Posted at 2018-1-19 07:32
Thanks Susan.

The Phantom 4 Pro was not new, but from someone that purchase it and then found out it was not something he was interested in moving forward with.

Thanks for clarification. One drone can only be activated once, you can login your DJI Account to fly. There is no need to do other registration with DJI.

DJI Susan Posted at 2018-1-22 18:48
Thanks for clarification. One drone can only be activated once, you can login your DJI Account to fly. There is no need to do other registration with DJI.

Can purchase a DJI care agreement?