Amazon.com: Google Nexus S Cell Phone Black Factory Unlocked: Cell Phones & Accessories
Its says it has these bands:
Quad-band GSM: 850, 900, 1800, 190
Tri-band HSPA: 900, 2100, 1700
Its says it has these bands:
Quad-band GSM: 850, 900, 1800, 190
Tri-band HSPA: 900, 2100, 1700