I have had problems with my other phones sim card trays. I would make sure the tray is fully inserted by pressing on the body of it. I have also had the trays get bent in the past. I would make sure the card is appearing nice and clean and no sand or lint in the tray or on card. When it happened to me it took me a couple days to realize why I had radio silence. Have a good afternoon
SIM cards don't fail too often. Is your account status active?
A few basic troubleshooting advice:
Maybe try to remove SIM card, re-insert and see whether that works.
Also can try the SIM card in another working phone. That helps determine whether hardware issue versus PM service problem
@Ralf68 is that a new activation? or the sim card was working before and just stopped working today?
first thing to try, reseat your sim card. Power off device first, take the sim card out and wait for a minute. Then put it back in and power up
If that still does not work, please put your sim card in another working phone to check
Also, try to put another active sim card in your current phone. We need to make sure if it is a device problem or your sim card