If you leave you cell service active you're likely to be charged roaming cost. When I travel to the States I put my Apple iPhone in airplane mode but leave my Wifi activated. I then will communicate to family and friends using Wifi from the hotel via social media messenger apps. There are travel sim cards you can purchase for you phone however you will be assigned a different phone number. There are usually no guarantee the travel sim cards work seamlessly so make sure you do your research before you take this route of purchase. Alternatively if you want the easiest seamless operation of your cell coverage pay the 16$ and select your days of usage.
