Use Google's Nexus 7 Tablet As a VoIP Phone, For Free

[wraggster]

I don't usually do 'how-to' postings, and I'll have much more comprehensive discussions of Android 'Jelly Bean' and the Google Nexus 7 tablet later — there are some really fascinating implications to how that ecosystem is developing. But since quite a few people have been asking me if it's possible to use the Wi-Fi-based Nexus 7 as a phone, I thought I'd scribble out this quickie guide. In short, yes, even though the N7 doesn't obviously have phone-related user interfaces, you can use the N7 as a phone for both outgoing and incoming calls (http://lauren.vortex.com/archive/000979.html) via VoIP, and this can be accomplished completely for free via Google Voice accounts.

http://tech.slashdot.org/story/12/08/16/1445254/use-googles-nexus-7-tablet-as-a-voip-phone-for-free