How is it that Huawei's mobile phone automatically sends text messages when it doesn't answer the phone?

Hello, bosom friend! Take Huawei's c8950d as an example. There is a do not disturb mode in the phone settings (some are driving mode, undisturbed mode, or in the phone scene mode). If you find that pattern, you can automatically reply to one and modify it according to the prompt. Occasionally, there is a problem with the mobile phone system, not a simple SMS automatic reply problem, but a joint problem, and the possibility is slim. good luck ...