When reading a novel with the mobile phone's browser, it would sometimes pop up and show that the sim card was not ready. what's

This might be due to the fact that the mobile phone browser needed to use the SIM card function when reading the novel, causing the browser to not work properly. The SIM card was not ready. Some mobile phone websites might automatically be disconnected when reading a novel, making it impossible to continue reading. In addition, the browser may not be able to load the page normally due to network connection problems, resulting in a prompt that the sim card is not ready. If you encounter such a situation, you can try to restart the browser or change the browser version to solve it. If the problem still exists, you can try changing the settings of the browser or reinstalling the browser software.