Samsung EK-GC110ZKAXAR - Manual (Page 53)

Entering Text 49
4. At the Speak now prompt, speak clearly and distinctly
into the microphone.
5. If the red microphone turns gray, then the feature has
timed out and you should tap the microphone icon to
start again.
The text is displayed in the message as you are
speaking.
Note: The feature works best when you break your message
down into smaller segments.