Anyone who has been following knows there has been a lot of discussion about using voip on cellular networks. I have been using it with TMo's 4g monthly plan. Now, for me, grooveIP was an OK solution. The call quality could be pretty poor at times though, and it wouldn't always stay connected to the network (annoying because you would miss incoming calls). Most of the time it would sound pretty damn good, but it just seemed when I needed it most it simply wasnt good enough. Then i tried the PBXes.org solution with SipDroid. That was better, however again the call quality left much to be desired, and the call lag at times would force me and the other party to talk over eachother constantly. I thought I could train myself to work around this, but that was a pipe dream. Recently, talkatone was getting me by. The sound quality was actually fairly decent... it wasnt too hard to understand conversations... but the dreaded call lag was just unbearable. Fed up, I finally decided I probably have to pay a little money to have a good solution. Enter Skype. Got a new online number, and tied it to my gv account. I had been a skype user for years as a house line, and it was always great. So I figured since I remembered liking it so much I would try it again but this time on my cellphone. Results? amazing. really! $90/yr for unlimited service, or $60 for the number and 2 cents a min for calls. In other words, it adds $7 a month to my cell bill... but it does give me another option in case my cellphone gets lost or unavailable. What's so great about it? Landline call quality on 4g. No joke. You hear a little crackling here and there as the connection fades and whatnot, but its nothing like what happens to the free sip solutions. Call lag? non existent. At least you don't notice it.... And so far, it stays connected and there has been no issues. And of course, it has tried and true video calling built in. I still want to setup a raspberry pi with asterisk and run a pay-for-sip trunk on it, just to see how it compares... but so far Skype absolutely destroys anything else Ive tried. I talk to people over cell networks now and they dont even know it. It really does sound like a landline! It really is better then my actual cellular calls. And of course, its even better when Im on wifi. I think I understand now why MS wanted to buy Skype- they clearly have some of the best VOIP technology out there. Anyone else been playing around like I have? thoughts?