This is what I was talking about, but I am not sure if it is available for any phone or just certain ones.
T-Mobile Data Only Plan
This is a discussion on Nexus One and VOIP within the Nexus One forums, part of the Google Phones category; This is what I was talking about, but I am not sure if it is available for any phone or just certain ones. T-Mobile Data ...
Hrm, ive searched for it trying to get there and only found links that specifically called out phone OS. Also called a store and they told me it was that way too, though I gues as long as you can click it and order the sim, which it seems like you can, guess it doesnt matter.
free voip - use fring form the marketplace (fring- talk, video, chat and interact with Skype, MSN Messenger, Google Talk, ICQ, SIP, Facebook, Yahoo! and AIM) and skype with wifi connection IT IS FREE NO NEED TO USE ANY PHONE PROVIDER
I didn't see this noted here: Skype for Droid is "Skype Lite" - it uses the cellular connection to get to the Skype server. The iPhone has a real Skype that will work over WiFi, and I hope there will be a similar droid offering soon.
I use fring combined with my skype unlimited plan for $12month... I also have a skype In number... with this combination I have a working line that I can receive calls on and free outgoing voip/wifi calls.
Anywhere with wifi I can make free voip calls anywhere my skype unlimited plan covers me which is i think about 32 countries including here in the States. Going through google voice usually incurs international charges albeit they are cheap.
I even had to prove my theory to myself by inserting a dummy sim card in my phone so no service provider is there and there's no problem when on wifi making calls... confusing but works. Perfect for making overseas calls for $12/month
Hey man if you don't have a Gizmo5 account try Skype. Skype is like .017c per min. Buy Skype credit than use a app called Fring or Nimbuzz and get in and out calls using VOIP.