What to do if the error message "Unable to add this carrier's cellular package" appears?

1. Check if the device supports eSIM functionality; some older models may not be compatible.

2. Confirm the device system has been updated to the latest version; older versions may have compatibility issues.

3. Check the network connection and try again after switching to a stable Wi-Fi.

4. Clear the device's network cache or restart the device and try again.