Question: how to transfer whatsapp chats from huawei to huawei?
Answer: On the new phone, open Phone Clone, and go to This is the new phone > Huawei. ... 
On the old phone, open Phone Clone, and choose This is the old phone. ... 
On the old phone, tap Apps and data, select the data you'd like to transfer, and make sure WhatsApp (with the data size) is selected.