Nokia SMS can't be sent out

1. Enter the SMS Outbox, click on this undeliverable message and move it into the draft box;

2. Enter "Menu-Tools-Scene Mode" and select "Offline". At this time, the mobile phone is offline;

3. Go back to the short message draft box and send the short message offline, and a prompt "Saving in Outbox" will appear;

4. Turn off the phone and turn it on again, and "Do you want to continue using the phone in offline mode?" To ask a question, please select "No". After the boot, the SMS can be sent!