HTC J Butterfly HTL21 Phablet full specifications and features are given here. As the price of HTC J Butterfly HTL21 is not revealed we have to wait for the official announcement. Designed and developed by HTC, the Phablet was unveiled on 17th October 2012 by KDDI, a Japanese carrier. The HTC J Butterfly HTL21 would be the world’s first Phablet to feature a 1080 pixel display. HTC J Butterfly HTL21 was one of the most expected Phablet to be released in 2012. Read more to know about HTC Butterfly HTL21.