Hello, when I fly.GPRS connection is normal, control connection is normal.satellite 18, compass calibration is normal, I could not control it.I have 20-30 m of driving and then I forcibly landed.I am afraid to fly.

Just to verify, you could control the drone first then you were not able to control it when you flew it for about  20-30 m, right? Did you get any prompt on the app when you can not control the drone?