If you change the SIM card to another phone, will the history of messages in WhatsApp be saved - briefly?
If you change your SIM card from one phone to another, your WhatsApp message history will not be saved on the new device. To transfer your chat history, you should use the backup and restore feature provided by WhatsApp.
If you change the SIM card to another phone, will the history of messages in WhatsApp be saved - in detail?
If you switch your SIM card from one phone to another, the history of your WhatsApp messages will not be affected. WhatsApp messages are not stored on the SIM card; instead, they are backed up to cloud storage linked to your phone number. When you change phones but keep the same phone number, WhatsApp will detect the change and prompt you to verify your phone number via an SMS code or a phone call. Once verified, all your message history, along with other data such as photos, videos, and voice messages, will be restored from the cloud backup. This process ensures that your conversations remain intact regardless of the device you use, provided that your phone number remains constant.