Hello there, I just got an OTG cable to connect the Spark RC to my cellphone and it works, I can fly the Spark with WIFI switched off on cellphone. Only issue I noticed is that the battery indicator on the phone shows that it is charging (little lightning bolt on battery), although hard to believe because as I am flying the Spark the battery is discharging (% indicator) and the RC battery is also discharging as normal (% indicator in the DJI GO 4 app) as I fly. I tried a different OTG cable and the same happens, connection is fine, Spark flies. The phone I am using is a Blackberry DTEK60 with Android. Any ideas anyone?