Yesterday, I couldn't send a text message, make a phone call, and there was no traffic. The signal is full.

Unable to send SMS: 1, the cell phone signal is not good, so it is recommended to 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 to replace it. 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-More settings-Restore factory settings-Restore all settings (without deleting any data of the phone). You find your problem and try to solve it according to the above method.

Unable to receive SMS normally: You can click SMS-Yarn-Dyed-SMS Center Number to check whether the number of SMS Center is correct. If you find the correct SMS center number, you can search the center number of the operator in your area online. If the number of the SMS center is correct, it is suggested to refer to the following methods: 1. I suggest you try to restore the settings. Enter phone settings-General/More settings-Restore factory settings-Restore all settings (without deleting any data of the phone) 2. You can update the system version and optimize the system. Try it: Click Settings-General/More Settings-System Upgrade-Check the update immediately, download the upgrade package according to the prompt, click Verify Installation, and the phone will automatically enter the upgrade mode when it is restarted. 3. Back up important data, such as contacts, photos, information, etc., and try to solve it by clearing abnormal data. Click Settings-General/More Settings-Restore Factory Settings-Clear all data.