The DVSWITCH app is great. But there is the problem in the car with the PTT. In many countries, touching the phone while driving is punishable by law. Currently I use a bluetooth button for the PTT which is intended to take a picture with the telephone (code 24), but after a few uses the phone goes into alarm mode and I have to restart the phone. Is there a viable solution to this problem or a real alternative for PTT with a classic mobile phone with a Zello-like PTT button that works well with DVSWITCH ? Thank you for your answers.