You don't have to do anything special to make your phone work in the USA. However, you can't use your actual plan there as you would in Canada. Once in the US, you are on PPU (pay per use). $1.50/minute, $0.60 per text sent AND receive and I believe it was $3/MB for data. Koodo does have some USA roaming packages (here: https://shop.koodomobile.com/plans/ad...) but that's the best you can get from Koodo.