What does 자물쇠 look like on Samsung?

On Samsung it is the design shipped in One UI 8.5, shown above at full size. Older revisions are listed beneath it.

When did Samsung add 자물쇠?

Samsung first drew 자물쇠 in Touchwiz 2.0, released 2013년 4월 26일.

Samsung Electronics has shipped 26 versions of 자물쇠. Each is dated, so you can see when the design changed.

Samsung Experience 9.5

This is the design Samsung introduced in Experience 9.0, shipped again unchanged. It was not redrawn for this release.

✳ marks a release that redrew this emoji. The rest re-shipped the design unchanged.

What does 자물쇠 look like on Samsung?: On Samsung it is the design shipped in One UI 8.5, shown above at full size. Older revisions are listed beneath it.
When did Samsung add 자물쇠?: Samsung first drew 자물쇠 in Touchwiz 2.0, released 2013년 4월 26일.
How many times has Samsung redrawn 자물쇠?: Samsung Electronics has shipped 26 versions of 자물쇠. Each is dated, so you can see when the design changed.