Step 1: Run Backuptrans iPhone WhatsApp Transfer and then connect your iPhone 7/7 Plus and old iPhone to computer with USB cable. Then the software will automatically read all WhatsApp chat messages from your iPhones and show them on its main interface:
Step 2: Click the old iPhone 6S/6/5S/5/4S in Devices list you want to copy WhatsApp chats from.
Step 3: Turn to top toolbar and press "Transfer Messages from iPhone to iPhone" button or go File -> Transfer Messages from iPhone to iPhone.
Step 4: Select your target iPhone 7 or iPhone 7 Plus that you want to copy WhatsApp chat history to. Click Confirm to continue.
Done! All your old iPhone 6S/6/5S/5/4S Whatsapp chat history have been migreated and merged perfectly on your iPhone 7 or iPhone 7 Plus. Free download Backuptrans iPhone WhatsApp Transfer on your computer to try now.
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