Why are there always messages that start with 00?

Turn on the information filtering function

Apple mobile phones often receive spam messages, and you can turn on the information filtering function to filter out spam messages. The way to open it is to enter the settings app and find the "Information" option. Then find the "unknown and filtered information" option, and open the "filter unknown senders" option after entering.

When turned on, many spam messages will be displayed in "Filter Information".

Of course, the understanding of this function is not accurate enough. In fact, there are still many spam messages that cannot be accurately identified and filtered, and the recognition rate is about 50%. If you really don't want to receive a spam message, it is very difficult, so it is also important to protect your personal information at ordinary times.