Hi,  How can I add a Used Phantom 4 pro to my account?

email address is ibwillb@gmail.com  si# of drone 0AXDE260A20143

you can not do that ....

Just start flying with it on the phone/tablet you have the DJI Go4 app on.

Hello there Will Butler. Thank you for reaching out and for the inquiry. Kindly please download the DJI Go 4 application on your mobile device and put in the email account you are using here at DJI Forum for you to be able to use and fly your DJI Phantom 4 Pro. Just a reminder that if this DJI drone is a used drone and has already been activated before by the previous owner. We are sorry that the activation information of DJI drone can not be changed. Thank you.

Hi Will, if you mean the Forum account, unfortunately, it can not be added. Only the device which was activated with the same Forum account can be synced. Appreciate your understanding..

.... the question is clear, the answer in # 3 is also quite clear

You can still fly it . Just won't show up in your profile.

I want to be able to get the drone serviced from a crash and get the gimble fixed, by my dji account only has the new osmo on I cant find a way to get the used drone in so that it can be fixed.