Recently @evleaks posted information about new HTC Zara, here some specifications about this device.
Processor Dual Core 1.4Ghz (Qualcomm 400)
Display 4.5 inch qHD resolution
Cameras HTC UltraPixel Camera/1.6mp
Wi-Fi 802.11 a/b/g/n
It will be available in Sprint USA Network, possibly in Europe/Asia and will have Dual Sim modification for China.
Thanks to anonymous source. If you have any interesting news you can contact me via PM in twitter.