This is a refurbushed drone I just got.  When I try to activate it via the app connected to the remote I get the error: Activation Failed Server Error (500).  I have tried on 4f and wifi.  What do I do?  This is the second refurb unit they have sent me and I am really sick of DJI at this point. Please help.

I used a different phone and it activated.

Hello and good day Freakaccident12. I am sorry for the trouble and thank you for reaching out. Can you please try to change to a different network and try to activate the said drone. If in case that the issue will still persist. Please try to activate the said drone after few hours. Please keep us posted on the said issue for us to help you further. Thank you.

Apple devices works best IMHO.