The US version of the HTC One S is exclusive to T-Mobile USA carrier. This handset works on T-Mobile’s lightning-quick tri-band HSPA+ 42Mbps (900/1700/2100 MHz) network, which the carrier calls 4G. The One S is also a  quad band GSM (850/900/1800/1900 MHz) world phone with GPRS and EDGE and it supports 3G UMTS on T-Mobile [...]