SNRB, thanks for all the hard work. This is truly a great product you have and it's helping to pave the way out from phne carrier bs. I'm trying to move away from TMobile's WIFI calling feature which was amazing when it worked on my HTC G2 but not so amazing at all on the Galaxy s3. It's broken now and they're not sure when it'll be fixed.
I use grooveip and recently found the groove forwarder app. I was excited when I understood that it can simulat tmobile's wifi calling feature by setting the forwarding to grooveip vs cell phone network depending on the wifi connection. Unfortunately, it doesnt seem like it can do it automatically. The only thing possible without having a data connection as you explained in this thread is to change the values manually.
I assumed you had a server that would continuously ping the forwarder app to determine if it's reachable online. Once it's no longer reachable, the server would switch to forward to the cell network. Once the forwarder contacts the server and pings restart, it would switch to grooveip/gtalk.
Any chance that this automatic behavior could become a reality any time soon? It'd be worth upping the price of the .99 cent app for sure.
Again, thanks for helping me get this far!