Hi Pendrives/mouse etc work fine. Have tested on multiple Xiaomi phones including recent ones since everyone in family uses Xiaomi only . Will try to get a Samsung with USB port and test. Thanks btw.Older models may not have native OTG support. Which phone are you using? Using an OTG and not standard USB adapter?
Sorry if I confused you. The phone does not detect the controller at all. My under is that once the phone and controller are connected, the blinking light on Android/Xbox mode should stay on. Mine keeps blinking and Gamesir app does not detect the controller either.Stock app may be problematic. Try setup again with TelloFPV.