Hi, will be travelling to the US (one week) and Canada (three weeks) later in the year. I know there are lots of WiFi opportunities but would like to have coverage whilst travelling in car etc. From what I have read here it appears that the advice is to buy an AT&T micro sim with a VISA 'gift card' - to get around the whole US visa card thing? My second question is should I buy the AT&T International Plan to carry me in to Canada or buy another Canadian micro sim when we get there? I am happy to sacrifice a little extra cost if it means we are not spending half of our holiday searching for stores to find sims! Lastly, we will be transiting through LAX (then on to Boston) - anywhere there to buy a micro sim? Thanks in advance for any help.