Hi. I have a 2 year contract for my iPhone 3GS, and have no issues with that whatsoever. I just wanted to have another sim card, such as a pre-paid one so that when when I take a small weekend trip with my fiance.. I don't get disturbed with any calls from work, but at the same time I have full access to my iPhone (music, videos, internet, and calling). Would that be possible? If not, does a pre-paid SIM card exist where I can use the calling but will just live briefly that weekend without the internet access? Thanks.