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If you are working or traveling abroad, you want to be sure you are able to stay in contact by using an international cell phone capable
connecting to networks in all countries. All you need is an unlocked cell phone and a SIM card for the local country (or roaming fees
will apply if you use your phone from home).
Here are some sources for international cell phones, unlocked so you can use a local SIM card.
If you have an unlocked international cell phone, be sure it's a GSM Tri-Band. These phones work in virtually all countries. Don't get a CDMA phone, that technology is basically limited to North America. Tri-Band unlocked cell phones will work in all European countries, Asian countries, and of course Persian Gulf countries including Dubai.
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Perhaps a Google search for International Cell Phone related sites or unlocked cell phone sites: