What does No Littering 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 No Littering?

HTC first drew No Littering in Sense 7, released March 30, 2015.

HTC Corporation has shipped 2 versions of No Littering. Each is dated, so you can see when the design changed.

HTC

HTC Corporation has drawn No Littering 2 times. Every revision HTC has shipped is below, newest first.

What does No Littering 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 No Littering?: HTC first drew No Littering in Sense 7, released March 30, 2015.
How many times has HTC redrawn No Littering?: HTC Corporation has shipped 2 versions of No Littering. Each is dated, so you can see when the design changed.

HTC artwork for this emoji spans 2015 to 2016.