Dear AndreA,
Many thx. your fast and good quality reply. Yes, i'am aware this solution..but still interested to keep a kind of voip solution involved.
A basic idea :
Here in Germany i will register a free of charge Italy fixed landline ( Maybe Roma area )VoIP number in my device.
Maybe
messagenet.it
If a kind of italian fiscal number is needed this could be generate therefore maybe here:
communi.it
So all required is the cheapest prepaid solution to call a italian landline..might result in the same idea you gave already..
Purchase idea Sardinia region maybe ?
My regards, CB