What does Botão Quadrado Preto 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 Quadrado Preto?

HTC first drew Botão Quadrado Preto in Sense 7, released 30 de março de 2015.

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

HTC

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

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

HTC artwork for this emoji spans 2015 to 2016.