Hi! I crashed my drone and sent it to repair to my reseller's repair service, because the gimbal was broken. It came back today and it is impossible to connect it to the controller. What can I do? I read for the other phantom drones that we can do a firmware update by installing the file on the sd card, but I can't find any download page or .bin file to put on the sd card. I read in another thread that we can only do update via the app. But how do I do it if I can't connect my drone to it?
Also, before the repair I tried to connect it and it worked, but now it's impossible. The app says remote controller signal weak. What can I do?

Hi! I crashed my drone and sent it to repair to my reseller's repair service, because the gimbal was broken. It came back today and it is impossible to connect it to the controller. What can I do? I read for the other phantom drones that we can do a firmware update by installing the file on the sd card, but I can't find any download page or .bin file to put on the sd card. I read in another thread that we can only do update via the app. But how do I do it if I can't connect my drone to it?
Also, before the repair I tried to connect it and it worked, but now it's impossible. The app says remote controller signal weak. What can I do?