Please see below my code that is a complied (no errors by the Arduino's check) sketch. And the calling is not happening. The "dialing" is popped up in the Serial monitor so I assume that the call should be initiated but nothing happens on the called phone...
Is this a software issue or some kind of a hardware issue? A few days ago I had to change the voltage regulator on my Arduino module as that was not turned on from a wall plugged power supply. Now it is working well but the call is not starting.
Please do you have any idea what is wrong? Thank you in advance. Laszlo