I have had issues with the controller not connecting to Solo. I tried to do a factory reset, but it wouldn't, so I looked on the threads on here and found out about how to rewrite the SD cards. So I have done that in both the controller and the Solo. Now when I first start it up, I can connect my phone to the controller, but the controller wont connect to the Solo. Also, the Solo and the controller both have version 0.6.4, but the app thinks that they still have 2.4.2 from before. The controller needs to do a preflight update and says to use the app to update. If someone could help that would be great because I want it back in the air again.