Sorry Phil, one more time. Here is the HTC One frequencies spec on t-mobile site. It seems like the t-mobile version will
FULLY support both AT&T and T-Mobile bands for 2G, 3G, 4G, and LTE. Correct? Thanks.
Band (frequency)
GSM bands 850/900/1800/1900 MHz
UMTS: Band I(2100)
UMTS: Band II(1900)
UMTS: Band IV(1700/2100/AAWS)
UMTS: Band V(850)
LTE Band: 4, 17
Connectivity
Wi-Fi: 802.11 a/ac/b/g/n
Mobile data: LTE/UMTS/HSPA+ 42 Mbps
4G Capable
Bluetooth? connectivity
Wi-Fi Calling and mobile calling
DLNA? for wirelessly sharing
NFC capable
HTC One Phone | The New HTC One with 1080P HD Screen | T-Mobile