This article is outdated, please read the following article to learn how to export WhatsApp data with iMazing: https://imazing.com/guides/how-to-export-backup-and-transfer-ios-apps-data-and-settings
Move your whole WhatsApp chats and message history from one iPhone to another:
A - Connect the iPhone containing the chat messages you'd like to transfer over and launch DiskAid
1 - Open DiskAid preferences and make sure that "Show Apps even they don't have File Sharing" is enabled
2 - Go to Apps in DiskAid and open WhatsApp
3 - Open the Documents folder
4 - Copy the files ChatStorage.sqlite, Contacts.sqlite, StatusList.plist and wallpaper to your computer
B - Connect the iPhone on which you want to copy or restore the WhatsApp chats (disconnect the former iPhone if you are using DiskAid 5.x or below)
1 - Go to Apps in DiskAid and open WhatsApp
2 - Open the Documents folder
3 - Copy the files ChatStorage.sqlite, Contacts.sqlite, StatusList.plist and wallpaper from your computer - as these already exist even if they are empty accept to overwrite if prompted
C - Close WhatsApp and relaunch it, all your chat history is here!
NOTE: WhatsApp stores pictures in the Camera Roll, head there within DiskAid to transfer the pictures associated with the chats!