HTC is working a smartphone with model number HTC 608t which will initially be meant for China region. Japanese blog noted that China’s Ministry of Industry and Information Technology for Telecom Equipments has certified the HTC 608t smartphone. This HTC handset appears to be a mid-range device.
Running Android mobile operating system, this smartphone appears to be a successor of the current HTC One SV smartphone with a Dual-SIM capability. 
The HTC 608t will feature dual speakers in the front just like the one found in the HTC One and will have a camera at the back with LED flash above it.
Of course the smartphone will feature Beats Audio integration. No further details could be inferred from the listing. HTC is expected to announce this dual-SIM smartphone sometime later this year.