Seams like Huawei together with Dell are working together to bring you a Notebook (EM770U) with Global 3G bands, including T-Mobile 3G ASW. Huawei is launching a Mobile broadband EM770U compatible with Quadband GSM/EDGE and 850/1900/1700 (Band II, IV and V) HSDPA/HSUPA used by AT&T and T-Mobile. But, this broadband is going to be built in on a Dell Laptop. This is going to be one of the first laptops compatible with AWS WCDMA bands.
There were some rumors about some Dell laptops coming with T-Mobile 3G bands. That day is getting closer.