If someone has changed their SIM card, what will it show in WhatsApp?

If someone has changed their SIM card, what will it show in WhatsApp - briefly?

If a user changes their SIM card, WhatsApp will notify the contacts that the phone number associated with the account has changed. The notification will include the new phone number.

If someone has changed their SIM card, what will it show in WhatsApp - in detail?

When an individual changes their SIM card, the impact on WhatsApp can be significant. This action essentially disconnects the phone number from WhatsApp's servers, leading to several observable consequences within the app.

Firstly, the user who has changed their SIM card will lose access to their WhatsApp account associated with the old number. This is because WhatsApp requires a valid phone number for initial setup and subsequent logins. Upon inserting the new SIM card into their device, they will find that their previous chats, contacts, and media are no longer accessible through the app. Essentially, the user starts afresh with a new WhatsApp account linked to the new phone number.

Secondly, for users who were in communication with the individual before the SIM card change, there will be noticeable changes as well. The contact name associated with the old phone number will remain in their contacts list, but any attempts to send messages or make calls through WhatsApp will fail. The app may display a message indicating that the recipient is no longer using WhatsApp, signaling that the account linked to the old number has been deactivated or the SIM card associated with it has changed.

It's important to note that while changing a SIM card does not inherently compromise the security of existing chats, it can lead to loss of data and disruption in communication. WhatsApp emphasizes the importance of keeping your phone number up-to-date within the app to maintain seamless access to all features and conversations.

In summary, changing a SIM card results in the deactivation of the old WhatsApp account associated with that number. The user will need to set up a new account using the new SIM card, and contacts will no longer be able to reach the old number through WhatsApp.