I searched all of the carriers/plans. I ended up with ATT prepaid "GoPhone" I used my own smart phone. $ 45/m for unlimited talk and text and 2 gig of data. There is a month carryover for data, so unused is available the next month. If you provide a cc for automatic payment, they deduct $5/m, so $40 in the end. One thing that sold me is, as they call it "unlimited data", so if you hit your data allowance, they do not cut you off, they just lower the speed to 128k. All of the other carriers would either cut off the data or auto add more for $$$. I have never hit my data limit since I use WiFi at home and work, and only when I am in the car or otherwise out do I use my phone data. We have 2 lined (me and wife) for less than most people pay for one line.
paul