What does 되감기 버튼 look like on HTC?

On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.

When did HTC add 되감기 버튼?

HTC first drew 되감기 버튼 in Sense 7, released 2015년 3월 30일.

HTC Corporation has shipped 2 versions of 되감기 버튼. Each is dated, so you can see when the design changed.

HTC

HTC Corporation has drawn 되감기 버튼 2 times. Every revision HTC has shipped is below, newest first.

What does 되감기 버튼 look like on HTC?: On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.
When did HTC add 되감기 버튼?: HTC first drew 되감기 버튼 in Sense 7, released 2015년 3월 30일.
How many times has HTC redrawn 되감기 버튼?: HTC Corporation has shipped 2 versions of 되감기 버튼. Each is dated, so you can see when the design changed.

HTC artwork for this emoji spans 2015 to 2016.