It looks like things are moving quite nicely already for the Viewsonic G Tablet development area. XDA member wlawyer points us to a very complete tutorial on how to make free calls with the Tablet by using sipdroid, Google Voice, and gizmo5. wlawyer states that the call clarity is not bad, but that a few people have complained about the voice quality being bad on the receiving end. While not perfect, this is indeed a nice alternative to use the Tablet as a phone.
The dev has posted a link to the tutorial in the thread, so please follow it and leave your comments.
Looks like you can use google voice, gizmo5 and sipdroid to make free landline calls with the gtablet too. I am using CM B2 and was able to set things up using the directions I have used before at h ttp://androidcommunity.com/forums/f4/how-to-free-calls-via-wifi-using-google-voice-and-gizmo5-21836/
Keep in mind this is not perfect and I was only calling some after hours mailboxes since its late here but if you turn it to speaker phone it seems we can use our gtabs as a phone as well.
Edit: When I tried to call someone this morning I could here them pretty good but they said my voice was pretty bad though it may be this crappy hotel wireless doing that.
You can find more information in the guide thread.
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