This is the logo for WhatsApp. The logo is an old school telephone with the earpiece at the top with a handle in the middle and the microphone in the bottom. The phone is place inside of an air bubble that resembles a thought bubble.
Related to WhatsApp Icon
Related icons are the icons with matching tags, as well as all logos icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors
The Whatsapp is a popular app that has been around since 2009. The company was bought by Facebook not long after that. It is a great icon to use when you want to let people know chat is available, or that they can chat with you via this app.