The box could be installed very easy - SIM card Insert (I've previously the PIN code request in a mobile phone issued) - Phone and Power Supply - (possibly) antenna plug in - finished. So easy! The voice quality is GSM - according to - well, you can hear a slight noise, but not too disruptive The reception performance is, especially with external antenna very well. This box is highly recommended if you want to make calls from home with an analogue telephone via the mobile network.