WhatsApp is the world's most popular chat app, but it can be daunting if you're new. Here's our guide on how to use WhatsApp!

How to encrypt text messages with WhatsApp To ensure that messages between Apple and Android users are encrypted, you can use the text messaging app WhatsApp.

If you don't have a mobile phone or can't send a text message due to a lack of network bars, use the trick below to compose and send a text message via email to an AT&T phone number.