I recieved my drone back today from dji repair center. How do i connect it to my dji go 4 app?

Hi there, may we know if you encountered any trouble connecting the phone to the controller? If the DJI GO 4 app is not updated, please update the app and check the first tutorial for connecting the controller and mobile device. If the aircraft and controller are disconnected, please refer to the second tutorial the relink them. Hope this helps.