This week, WhatsApp added a number of new features, including the ability to mute people during group calls (via Android Central). This sanity-saving feature appears to be useful not only for muting people who forget to do so, but also if you're in the same room as someone else on the call and don't want to hear an echo of their words.

When your smartphone keeps pinging you with irrelevant, distracting or annoying WhatsApp messages, you might find yourself asking how to leave a WhatsApp group without offending the other members.