Japanese by Example
Learning through examples in manga

Sending a text message with 送信

ひらやすみ » Volume 1 » Page 63

Hiroto is having dinner with his friend Hideki. After Hideki reveals that his wife is going to have a baby, he looks down at his phone and sees a text message he needs to respond to.

ヒデキ:
「ホイ 送信(そうしん)。」
“And...sent.”
ヒロト:
「スゴイなぁ ヒデキ。」
“You're amazing, Hideki.”

送信(そうしん) is typically used for electronic transmissions, such as the text message sent here.