Why can't the mobile phone send short messages? My mobile phone is Lenovo A820t. I can receive short messages but can't send them, so I can't send them.

Hello, thank you for choosing Lenovo products.

1. Please confirm whether the mobile phone is in arrears;

2. If there is no arrears, all the short messages can't be sent. Try sending a short message to your mobile phone number with your mobile phone number to see if it is successful.

I suggest you check whether the number of the SMS center is set correctly. Please contact the operator to check the number of the SMS center.

You can click the menu button in the information interface, select Settings, and click "SMS Service Center" in the settings interface to check whether the number of SMS Center is correct;

5. If the message still cannot be sent, you can click the menu button in the information interface, select Settings-and then restore the default settings;

6. Have you tried to change other SIM cards? Can you send short messages normally? Do not rule out that it is caused by the abnormality of your SIM card;

7. If it still doesn't improve after trying, it is recommended that you send your mobile phone to a local maintenance point for inspection and maintenance as soon as possible, so as not to affect your subsequent use. ?

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Thank you for your support to Lenovo and wish you a happy life!