Vivoy 13t fell, so I can't send a message. What happened? I need it badly. .

According to your description, I suggest you solve it in the following ways:

1, the cell phone signal is not good. I suggest you try another area with good signal.

2, SMS center failure or maintenance, you can try another time.

3. The phone bill is in arrears or the SIM card is broken. Recharge the SIM card or try another one.

4. The number of SMS center has been modified and cannot be sent normally. Click SMS-Settings-SMS Center Number-View SMS Center Number, and then search your local SMS Center number online to see if your mobile phone is correct.

5. The mobile phone data is abnormal. You can restart it and try it, or if it doesn't work, try restoring the settings. Go to phone settings-General-Restore factory settings-Restore all settings (without deleting any data of your phone). You find your problem and try to solve it according to the above method.

If the above methods are not enough, I suggest you go to the after-sales inspection. The address of the after-sales service center can be found in the Settings-General-After-sales service menu.