My wife and I are visiting her family in Orange County Ca for a month. We are from Australia, and have HTC Desires that use the same bands as the AT&T network, so I was wondering if there is a possibility for us to be able to get a prepaid sim card for data and voice that we would only use for a month then dispose of. Trying to figure out AT&T's website is crazy, I have no interest in a "go phone" i just want a freakin sim with data and voice that will last me a month!!! Any help??