Hello Everyone. I stumbled across this forum because I wanted more out of my Infuse. I'm at the point where I wanted to use my phone on another carrier. This site was soo useful. I wanted to use my phone over the Straightalk network. I found out I needed to buy a nokia GSM phone. Well, when I went to their website, the Nokia's were no longer available but I did find out this useful info I'd like to share: Just a heads up to anyone interested. If you have an Unlocked GSM Cell phone or a regular AT&T Iphone, or Android phone. Straight Talk now sells SIM cards for $15 dollars and $45 a month no contract unlimited plan. You get full 3/4G speed that works over the AT&T network... So, I ordered my SIM card. I'll let y'all know how it goes. I'm a newbie to all of this so, if anybody already knows about this or have more info to share, hit me up.. Thanks to this forum!