For those of you who want to use your iPad’s cheap $29.99 a month data plan on your iPhone or any other device (that supports AT&T), you can use this simple hack of cutting out an old credit card then making the micro SIM card fit a regular-sized SIM card. And yes, insert it into the phone. Your voice won’t work but this is a great way to get a cheap broadband data if you don’t need to use iPhone as a phone. (AT&T drops calls like crazy so why bother?)
My advice is to really though stay away from AT&T if you can, their data network is one of the slowest, I prefer Sprint or Verizon.