Just done a first flight with the modded apk and to me it seems less stable than stock. I checked the 2.4ghz and see 1-11 channels so will be in FCC mode and did a run to between 500-600 meters and chickened out and bought it back and when getting between 200m-100m signal lost. Then within 100m on and off signal lost especially shooting HDR photos. It usually gains the signal again and I see I have 17 sats up above so that should be ok. Using my Samsung Galaxy S8 as mobile device. (keep getting told I need to update the firmware to 1.5.40 but hear too many bad stories so will wait.