In a while I will be changing operator and SIM card, but not number. I backed up contacts, SMSs, even call logs. But I have no idea how to back up Whatsapp conversations. Do I need to worry? In other words, when I do such a change, do I risk losing my Whatsapp chats or are they linked to the number, implying they will get transmitted to the new SIM with the same number? Or perhaps they are linked to the device, which will also stay unchanged?