We're excited to bring Android Oreo to HTC U11, HTC U Ultra, and HTC 10 owners worldwide! Details & additional devices to be announced soon.
— HTC USA (@HTCUSA) August 22, 2017
The company also noted to add the new OS update to more of their devices and that it’s going to be available globally. ‘Till then, HTC users might have to wait a little bit longer for further details.