Your sim card sent a message. What do you mean?

This usually means that your mobile phone or other devices that support SIM cards are using SIM cards to send short messages. It should be noted that in some cases, the prompt may indicate important information about your account status, payment reminders or other service notifications. SIM card is a microchip, which is used to store mobile phone numbers and information related to mobile network communication. When you insert the SIM card into your mobile phone or other devices that support SIM cards, you can use this number to make calls, send short messages and access the Internet. Therefore, the prompt indicates that a text message was sent through the mobile network using the mobile phone number associated with the SIM card. These messages may be plain text, or they may contain multimedia content such as pictures, videos or links.