Colorful display service is a mobile internet application service for telecom mobile phone customers. When making a phone call or answering a phone call, you can use the color display screen to display customized animation or video content to your family and friends, such as the latest photos, holiday wishes, driving scenes, fashion buzzwords and so on. The reasons for unsuccessful image signature verification may be: 1) The image size exceeds the required 50k；; 2) The content of the picture contains illegal information such as reaction, violence, * *, illegality and crime. The reasons for unsuccessful signature verification may be: 1) The number of signature words exceeds the requirements; 2) Signature contains reactionary, violent, * *, illegal, criminal and other illegal information. Broadband service can self-help troubleshooting, which is simple and easy to operate. In addition, you can also handle work order inquiry, ITV troubleshooting, broadband application and password service, which is convenient and fast. For more functions, please pay attention to China Telecom's Guizhou customer service. Customer service 2 19 will answer your questions.