What does Botão De Retroceder 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 Botão De Retroceder?

HTC first drew Botão De Retroceder in Sense 7, released 30 de março de 2015.

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

HTC

HTC Corporation has drawn Botão De Retroceder 2 times. Every revision HTC has shipped is below, newest first.

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

HTC artwork for this emoji spans 2015 to 2016.