roaming

I want to get a phone that I can use anywhere in the world. What should I look for?

First, make sure you have a GSM phone with a SIM card to get service worldwide. Second, make sure that the phone supports the "frequency bands" that are used outside your home country. Ask the store or check on the manufacturer's Web site. Third, check with your service provider to see if they have "roaming agreements" in the countries where you are going, so you can use the other network when traveling there.

Those three things are needed for you to make and receive calls anywhere in the world, and to be billed accurately for them.

International

When I use my mobile phone abroad, can I choose one mobile operator over another?

If your GSM mobile service plans supports international roaming, your mobile phone will only work in networks that have a roaming agreement with your home carrier. A list of preferred international carriers is stored in the SIM, and your phone automatically connects to networks based on the preferred order established by your carrier. Some carriers allow you to manually edit this preferred list.
International

I want to get a phone that I can use outside the United States. What should I look for?

First, make sure you get a GSM phone with a SIM card so you can have service worldwide.  Without a SIM, you will be limited to North America and some countries in the Far East.  Second, make sure that the phone supports the “frequency bands” that are used abroad.  Ask the store or check on the manufacturer’s Web site.  Third, check with your service provider to see if they have “roaming agreements” in the countries where you are going, so you can use the other network when traveling there.  Those three things are needed for you to make and receive calls anywhere in the world, an
U.S.
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