Place it right after a WhatsApp message sound in a chat-sketch edit, when the on-screen reply never comes. Follow it with an opened the audio button to show the nudge finally landed, or end the scene there for the unresolved version.
About this sound
A brief WhatsApp voice clip, about three seconds long, of a person saying 'ta'ane kvar' in Hebrew, urging someone to answer already. It lands as impatient and nagging in a funny, familiar way, like a friend tired of being left waiting. The clip comes from a WhatsApp voice message.