What are the common reasons for physical SIM card activation failure? How to resolve them?

Common reasons and solutions:

1. Device not unlocked: Confirm the device is not locked by the operator's network; test with another operator's SIM card.

2. Data roaming not enabled: Go to device settings and enable data roaming for the SIM card.

3. No network coverage in the area: Move to an area with good signal and re-search for the network.

4. Incorrect SIM card installation: Reinstall the SIM card correctly.

5. Package not purchased or expired: Confirm the package has been successfully purchased and is within the validity period.