I sold my mini 3.  I did a factory reset with the controller before I sent it.  The new owner says he can't sign in and can't connect to the drone.  How do I fix this situation?

You need to Unbind both the drone and the controller from your account before anyone else can use it.

Hello, there. Thank you for reaching out! Please make sure to unbind your account through the DJI Fly app via this path: Profile>Device Management>Account and Device>Remove device from account Furthermore, you may share this video tutorial with the buyer for the linking process:



I hope this information helps. Thank you for your support.