HTC_Tiara

According to a fresh leak, HTC plans to expand its Windows Phone 8 lineup with a new handset, which is bound to sit between the Windows Phone 8X and the Windows Phone 8S. The new HTC WP8 will be called as HTC Tiara.
HTC Tiara Specs
HTC Tiara will powered by 1.2Ghz dual core Snapdragon processor, packs with 4,3 inch size WVGA Super LCD2 display, sports with 8 GB of storage and 1GB of RAM, there is 8 megapixel rear facing camera and 1.6 megapixel front-facing camera, that powered by 1800 mAh battery capacity.

This phone will running Window Phone 8 GDR2 but there is no infromation regarding the design and availability or launching date specifically but, the rumors says HTC will launch this phone in mid-May this year, but HTC not yet confirm about this.