hello i cant chage my range settings or any of them can sombody help my

Hi, thanks for the inquiry. May we have the model of your mobile device that you are using? Did you manage to un-install and re-install the application? Please ensure that you will input numbers between 20m-500m. Kindly sync your flight records and save important files before deleting the app. If the concern will persist, I would recommend uploading a short video using the google drive or dropbox. Thank you for continued support.

i have  a samsung 9+ and i did reinstall it and wen i try to change the range it jumps back to 0

You must have the AC and remote on when changing settings.