Why can't I hear from others?

Hello, give some advice to the landlord:

① Check whether the mobile phone is in arrears;

(2) Check whether the SMS function is disabled (you can call customer service to select manual service query);

③ Check whether the cell phone signal is normal;

④ Check whether the security housekeeper on the mobile phone is intercepted or deleted;

⑤ Check whether the number of SMS center is set correctly;

6. Restart the phone.