Meaning
A mobile phone with short wavy lines on both sides, showing it is buzzing. It stands for vibration mode, the setting where a phone shakes instead of ringing.
People use it to say their phone is on vibrate in class or a meeting, to show a flood of notifications, or to describe shaking with excitement or nerves: “Phone on 📳, text me when you arrive” It pairs with 📴 for going fully offline and 🔕 for silent.