Back Up or Restore Chats
You can back up your WhatsApp chat history and media. If you lose your phone or switch to a new one, your chat history is safe.
On Android, you can back up your chats and media to your phone's memory or, depending on your phone’s settings, you can back up to your Google account. On iPhone, you can back up your chats and media to iCloud.
Be sure to manually back up your chats before uninstalling WhatsApp or restoring on a new phone. To successfully restore a backup, you need to use the same phone number and Google or iCloud account used to create the backup.