Black Touchtone Telephone refers to a Unicode symbol concept associated with the era when many legacy pictographic symbols were discussed as possible emoji-style characters. It represents a push-button desk telephone, typically imagined as a dark or solid black office phone with a handset resting on a base and a visible numeric keypad. Although related telephone symbols exist in Unicode, this specific concept did not become a widely supported, officially recommended emoji on modern emoji keyboards.
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Emoji History The emoji code/ image log of changes.
This emoji was one of the "suggested emojis" the Unicode group unveiled in June 2014 [article], however, it has been, and still is, up to the companies who support emoji in their operating systems to provide not only images but also an algorithm to replace the emoji code into the emoji image.
