When there is no SIM card, no service, or the device is not registered to the network, the network indicator on the router is solid red.
Make sure the SIM card is valid and inserted correctly;
Move the router to an area with a better signal (try placing it near a window).
These cookies are essential for the website to function properly and cannot be switched off in our cookie settings. They are usually set in response to actions you take, such as setting your privacy preferences, logging in, or filling in forms. You can set your browser to block or alert you about these cookies, but some parts of the website may not work properly.