Your WhatsApp chats are automatically backed up and saved daily to your phone's memory. Depending on your settings, you can also periodically backup your WhatsApp chats to Google Drive. If you uninstall WhatsApp from your phone , but don't want to lose any of your messages, be sure to manually back up your chats. 8 hours ago She allegedly sent her husband a series of expletive-littered messages and voice mails as the two argued over his drug use. WhatsApp uses your phone's Internet connection (4G/3G/2G/EDGE or Wi-Fi, as available) to send and receive messages to your friends and family. You do not have to pay for every message. As long as you have not exceeded your data limit or you are connected to a free Wi-Fi network, your carrier should not charge you.