You can buy an International SIM card Starter Pack and add your own amount of airtime or choose a Travel SIM pack or a Globetrotter pack with airtime already loaded. You can even order a World Mobile Phone with Global SIM card package that will work in virtually every country in the world - it's that easy to say goodbye forever to expensive call charges whenever you travel overseas!....PREPAID GPRS AND 3G DATA SERVICE:With the GO-SIM International SIM card, you can use your wireless device to access prepaid data services via GPRS in over 140 destinations world-wide from only $1 per MB. This means that you can control your data costs but still access those valuable files and applications over the Internet. In addition, high speed 3G is also available in many of the countries.That's right - you can send a text message to a Global SIM user for free. That's free to you AND free for the user to receive. How cool is that! Just enter the mobile number of the Global SIM user you wish to contact (excluding the country code), write your message and click on SEND. Your message will be sent immediately. Is there a better way to stay in touch with friends or loved ones for free? Happy texting!