Hi. I just used the gps mode since most users are using this mode. I dont have the courage to test the limit im afraid maybe the power is not enough to return home.[emoji3]For a good observation, send it out in Sport mode to get out there quicker.
Then, gain altitude to 120m (400ft) for better line of transmission past your 1256m
If you are in FCC mode, you should get this with OTG and antenna reflector (in the YouTube description):