What does زر "طوارئ" 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 زر "طوارئ"?

HTC first drew زر "طوارئ" in Sense 7, released 30 مارس 2015.

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

HTC

HTC Corporation has drawn زر "طوارئ" 2 times. Every revision HTC has shipped is below, newest first.

What does زر "طوارئ" 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 زر "طوارئ"?: HTC first drew زر "طوارئ" in Sense 7, released 30 مارس 2015.
How many times has HTC redrawn زر "طوارئ"?: HTC Corporation has shipped 2 versions of زر "طوارئ". Each is dated, so you can see when the design changed.

HTC artwork for this emoji spans 2015 to 2016.