With quadband GSM and pentaband HSPA+/WCDMA, the unlocked version of the Huawei Ascend D1 will be able to work on both AT&T and T-Mobile. But there has been no word on which U.S. carriers will be getting this device although it would be an excellent high end choice for some of the smaller, regional mobile operators. Regardless of where this model ends up, it is sure to become a favorite amongst those who want great performance at a reasonable price. We should see this unit hit the market sometime this quarter.
source: FCC via AndroidGuys