At the moment, when dialing an invalid number, Spark does not handle the exception thrown. The user should be notified of this change and the state should be changed.
Dial an invalid number then you MUST see a message in the dial field.
Spark MUSt show a toaster telling that the dialed number is invalid.
Added a message to the dial field when a invalid number is dialed.
I called 4442 and 44424545 but I did not see an error
Call Fail Event now triggers Invalid Number notification.