Telecom secondary card receives SMS prompting to turn it off.

There may be the following reasons for the telecom card to sit idly by for a long time without prompting to turn it off:

1. The mobile phone card itself may be damaged. You can try to take out the SIM card and insert it again, or replace another SIM card and insert it into this machine.

2. It may be that the mobile phone is set to turn off automatically. You can check whether the automatic shutdown option is turned on in the phone settings. If it is, you can choose to turn it off.

3. There may be something wrong with the mobile phone system. You can try to update the mobile phone system version or restore the factory settings.

4. Call interception can be set on the mobile phone. You can check the interception settings in the phone call settings and cancel the call interception.

5. Maybe the SIM card contacts are full. You can try to delete some unimportant contacts or back up important contacts to the cloud, and then try to make a normal call.

6. Call forwarding can be set on the mobile phone. You can check the call forwarding settings in the phone settings. If there is call forwarding, you can choose to cancel.

7. It may be that the mobile phone has set the flight mode. You can try to turn off the flight mode of your mobile phone, and then try to see if you can talk normally.

8. There may be a virus in the mobile phone. You can try to restore the factory settings and use security software to scan and disinfect your mobile phone comprehensively.

If the above methods are ineffective, it is recommended to contact the customer service of the mobile phone manufacturer or operator for consultation or maintenance.