Have any of you tried using your ST sim in an iPad? I'm still under AT&T for my iPhone contract, but am planning on switching to Straight Talk in the near future so I can save a little extra money that will go towards an iPad. I would like to avoid paying 2 wireless bills, so I am wondering if I could just switch my ST sim from my phone into the iPad and use it for data when I'm on long train rides and such? I don't need to pay for monthly data on an iPad, but there are a few times where it would come in handy. Or is there a better option if I stick with AT&T or even another carrier? I was hoping shared data plans would ease the cost, but after seeing Verizon's options I'm not too hopeful. Thanks!