If your phone is unable to recognize the SIM card 2, here are some steps you can take to troubleshoot the issue:
1. Check if the [Turn on] option of the SIM card is enabled;
2. Ensure that the SIM card is properly inserted into the SIM card tray. Power off the phone before removing or re-inserting the SIM card to avoid any potential damage;
3. Verify that the SIM card is not damaged or dirty and check the SIM card tray for any signs of damage or debris. Clean the SIM card gently with a dry cloth if necessary;
4. Try to restart your phone to see if the issue is resolved;
5. Ensure that the SIM card is compatible with the network bands supported by your phone;
6. Try inserting the SIM card into the SIM card slot 1 to check if it can be recognized there. This can help determine whether the issue is specific to SIM card slot 2;
7. Try inserting the SIM card into another phone to check if it can be recognized properly. This will help determine whether the issue lies with the SIM card itself or your current device.
If none of the above solutions work, please contact the local after-sales service center for further assistance.