Know what kind of phone he has?
Europe and America use different frequencies.
America is 850/1900MHz
Europe is 900/1800MHz
I have a Samsung phone that is a dual band 900/1900MHz, which is the most popular frequencies used. A lot are tri band with any 3 of those, and new Mortorola (like the Razer) are quad band and use all 4.
If they've got a 900/1800 or a single band of either of those, it won't work here.
