How to send SMS to customize SMS bill?

Dear Tianyi customers: You can write short message "DXZD" or "11"on your mobile phone and send it to "1000 1" to customize your short message bill. Thank you for your use. Thank you for your interest in telecom products. I wish you a happy life. If the above information can't solve your problem, you can also log in to Guangdong Telecom Mobile Mall () to seek help from online customer service, which is available 7X24 hours a day!