Unable to send SMS after root.

Hello, the possible reasons are: 1, phone card problem, call the operator to check the balance and change a phone card for testing; 2. The 2.SMS center number is set incorrectly. Call the operator and ask the other party to provide the correct center number, then go to SMS-SMS Settings-Information Center Settings and set the center number to the same. 3. Due to the current network situation, it is suggested to try it another time, or restore the phone to the factory settings through the settings menu.