Do you know that the HTC One M8 at least has two alternative names? If you do not know, I will tell you about the name. HTC One (M8) is also known as All New HTC One which means it is the same HTC One series likes before but branded and comes with full New on almost everything including its special design. The other name for this HTC One M8 is HTC M8.
The HTC One M8 in United States has already released along with Verizon Wireless and Sprint Carrier. The differences carrier is needed because of each carrier works under different GSM, 3G, CDMA, and 4G LTE frequencies.