The $10 airvoice plan has been great and I've been using it for about 1.5 years now. I've been using airvoice with an iphone 4 (purchased used for $100) since spring, before that it was a samsung hand-me-down from my BIL. Airvoice is perfect for my needs and really cheap to boot. Calls go through on the AT&T network, which is sometimes meh, but I don't talk that much. Or text that much, really. But when I do "text" a lot, it's via imessage or fb messenger while on wifi. I think I can use data, but I haven't made the call to Airvoice to do so, and haven't had a need for it ever, so I think I'll just keep my life simple and stick to wifi. Home and work have wifi, and if I'm elsewhere, it's usually because I should be doing something other than being on my phone (driving, running an errand, watching my kids play at a park, etc.). I don't really want another avenue to have my face glued to a screen while life is happening around me... I think once I got really chatty and had to refill my $10 a week early, but other than that one time, it's just $10 every 30 days.