What kind of cell phone will work in Iraq due to deployment?

I hear that quadband phones should work. I have a quadband phone from AT&T. I am aware that prices will be higher, though. If I get an international roaming plan with that phone should that work out? Or could I atleast use a sim-card from Iraq? Please respond with helpful information.

Q: Which of the satellite telephones would be the lightest?

A: Our Thuraya phone is by far the smallest satellite phone available. However, this phone can only be used throughout most of Europe, Central and Northern Africa, and in parts of Asia. This would be the ideal phone if you were traveling to Iraq or Afghanistan. The Iridium and Globalstar phones are also handheld. The Iridium phone works anywhere on the globe, while the Globalstar phone works throughout the Americas and across the Atlantic to and including Europe. The Globalstar phone can also be used in Australia. The Inmarsat phone is the size of a notebook computer and is one of the most reliable satellite technologies. It cannot, however, be moving while in use. It is the largest of the satellite phones and cannot be used at the North or South Poles.

My husband is in Iraq and these phones work.. Hope that helps