Dante, who is currently trying Google Voice, send me an email earlier today telling me that not everything works as smoothly as intended. One of the biggest current issues is that Google Voice numbers are not reachable. It might even be that it was possible to call the number from another phone previously.

Several users are reporting problems connecting to a Google Voice number from various devices. Other phones can call the same Google Voice number without problems on the other hand which makes the issue complicated and frustrating.

Google suggests to add a 1 to the phone number to see if it works then. They have setup a spreadsheet form that can be used by Google Voice users to report problems with the service. Users need to enter information such as their Google Voice number, an email where they can be contacted, the phone number and carrier of the caller and some additional information.

A Google employee mentioned that Google is aware of the issue and is working with carriers to resolve it:

We are aware that in some rare instances a Google number may not be reachable from certain phone carriers. We are working with these carriers to ensure that all routing information will be accurate and up to date. We expect the issue to be resolved shortly and we appreciate your patience if you happen to have been affected by this.

Dante also mentioned that the quality of international calls for the international caller is not very good at this time.