What does Caixa De Correio 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 Caixa De Correio?

HTC first drew Caixa De Correio in Sense 7, released 30 de março de 2015.

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

HTC

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

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

HTC artwork for this emoji spans 2015 to 2016.