If you have come across this article, you are probably looking at a way to cut global roaming costs whilst you travel. One of the best ways to do this is to get yourself an International SIM Card. If you are going to do some more research before you make your purchase, here are some things I suggest you do:

1. Compare Rates Against Your Home Mobile- Any reputable International SIM card company will have their rates online. Your home mobile carrier should also have their roaming rates online. You should compare these costs as your first step to ensuring that you will save money.
2. Compare Rates Against a SIM Card From The Country You Are Visiting- Another comparison you should do is to compare the rates of your international SIM card against the rates of a SIM card from the country you are heading to. An important thing to remember is that many of the calls you will be making are not local calls within the country, but international calls back home. These international rates are the most important rates.
3. Do Some Calculations- After comparing rates, I suggest you do some calculations to further reinforce in your mind that you will save money. Write down how much a 2 minute call would cost with an International SIM card, a SIM card from the country you are visiting and your home mobile. Remember, many of your calls will be international, and take in to account incoming call costs.
4. Look at How Much Others Have Saved- The final piece of research that you should look at is to look at what others have saved. You are not the first person to travel, and others have used international SIM cards. See what money they have saved as you will have similar results.