Hi everyone. I have 2 lines on my ATT account - one is my wife's and one is mine. Her line is due for an upgrade but mine is not. Since she has no interest in upgrading to iPhone 4, I would like to upgrade her line and then switch phones. However, simply swapping the SIM cards looks like it might be more difficult than I thought (since we will now have 2 different size cards). I've read a couple of articles that suggest you can add a outer "shell" to the new SIM card and then trim down the old one so that they fit. Is that really the only/best option? Thanks in advance for any help/ideas!