my old SIM card is not readable

I bought a new phone, and for some reason, my old SIM card is not readable on the new phone. I would try to go to a repair shop, but it will be closed tomorrow. Can you help me with this issue?

This message was edited 1 time. Last update was at 09/01/2023 03:33:14

Important: On many devices, carrier services are automatically approved after inserting your SIM card. Contact your service provider if you see an error message on your device or have problems with your SIM card or carrier services. Read more about how to activate my phone. You can set your phone to turn on Wi-Fi automatically and connect to a reliable network. This will connect your device to the nearest Wi-Fi network that you've used before. If Wi-Fi is turned off, you will only have access to mobile Internet.

This message was edited 1 time. Last update was at 09/01/2023 04:02:52

If you can not do anything, then try the helper on the site I left.

I will definitely try to follow the instructions you gave me. Only it will be tomorrow morning. Thank you for your help. I will contact the person on your site if anything happens.