Now that Public has US Roaming and since I live in a border city where I travel frequently to the US for dinner or shopping, an add-on plan with data, talk, and text (at a reasonable charge) that could roll over every month and get used as needed would be incredibly useful. Something similar to the plans that Wind Mobile has where you only use the US Roaming when you are there, even just for a short amount of time. This plan would carry over without expiry until used up, where you would have to purchase another plan to continue to use the package.
