Hello Joe. I'm honestly not sure how using Groundwire would affect the integrated Sprint/GV number. I would imagine that since it also has support for GV, it might interfere with the Voicemail features if any rerouting of the GV number is done so it moves from your phone to the Groundwire app. I wish I had a better answer, but I would only be guessing. It's true that I have a GV number, but I don't have Sprint, so it's not tied to my AT&T phone number the way it is with Sprint.

Regarding the usage of wi-fi, if they base it on the IP address you are at, and block it accordingly, then you would have to use a vpn. However if all they care about is using it on wifi, then it shouldn't matter and you can still make u.s. calls and your outgoing number would be the GV number which is still a u.S. number used to make calls to the U.S.

The quality is probably not as good as a real cell phone call, but with a good wifi connection, I would imagine that it should be acceptable.

I'm sorry I don't have concrete answers for you right now. I can give this app a try and see what I can figure out. I'm not planning on going overseas for a while, so all my testing would be from U.S. IP addresses.

--
Raul A. Gallegos
If you tell a joke in the forest, but nobody laughs, was it a joke? - Steven Wright
Home Page: http://raulgallegos.com
Twitter: https://twitter.com/rau47
Facebook: http://facebook.com/rgallegos74

On 5/12/2012 4:51 PM, Joe wrote:
Hi, I purchased Groundwire and am very impressed with its functionality.
For Raul and other veterans, I have some questions:

1. What would happen if I were to use the service with an integrated
Sprint Google Voice number? I don’t know what that would do with the
Phone app, and what would that mean for Visual Voice Mail?

2. If I’m using the service overseas in a wi-fi network, could I
theoretically make free U.S. calls from that other country, or am I
going to have to set up a VPN network to use a U.S. IP address?

3. Does the G729 codec significantly improve call quality to make it
worth the additional purchase?

For general reference, I used CallCentric as my SIP provider and IPKall
for a free DID number. I may write up a blog post on the subject in case
anyone’s interested on how to make/receive calls without paying beyond
the cost of the app.

Thanks for any help.

Joe

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