Hello guys,i think the best think on the 4PRO is the app,i use it all the time mobil,i tether from the phone and use as a transiver at the same time works great !!!!! I took the OpenSpot 4 PRO to Israel last year,didnt bother to take any radios with me,i worked all the modes true my phone ,i belive the audio is much better on the Android device also,i wish was an option to use the PTT button on my network radio other wise its just GREAT !!!!!!