Why is my Vodafone SIM card saying not registered on network?

Why is my Vodafone SIM card saying not registered on network?

When I encounter the message “not registered on network,” it typically indicates my Vodafone SIM card is unable to establish a connection with the mobile network. This can be due to a variety of reasons such as an inactive SIM, incorrect network settings, or the phone being locked to a different network. In such a…