Sim card issue

[Kernelious]

When I unfold my galaxy fold 4, phone can't read Sim card 1 and when I fold it works normally, this problem stared after last security update of March, please advise how I can fix this problem 

[Samsung_specialist]

SIM card, making sure to properly align the card with the tray. Once the SIM card tray is secured in place, turn your phone on to see if the error has been resolved.

Note: When handling the SIM card tray, be careful not to break or deform the tray.

Check 3. Reset mobile network settings
You may need to reset the mobile network settings on your phone after modifying phone settings or manually changing menu options.

Step 1. Open Settings > Tap General management.
Step 2. Tap Reset.
Step 3. Tap Reset mobile network settings.
Step 4. Read the onscreen information > Tap Reset settings.
Step 5. Read the caution information > Tap Reset to confirm.

If these steps do not resolve the issue, please visit the nearest service center: https://www.samsung.com/ae/support/service-center/.