SIM card and Prepaid Plan for US visitor
I will be visiting the US from Australia for 3 weeks next Month (September). I would like to use a US phone service rather than the very expensive global roaming from my Australian provider. So I would like to get a SIM card, prepaid "plan" and some data access (100-200MB). How can I best do this? I will be arriving at LAX and then transferring to Portland, OR, and late to Milwaukee.