Here are the steps for you to back up your WeChat history to your new phone. Step 1. Open the WeChat app. Step 2. Navigate to Me> Settings> Chats> Backup & Migrate Chats> Migrate Chats to  Step 3. Choose the history you want to back up to the new phone. Step 4. Then you should log in on your new phone and scan the QR and wait for the process to end.